code stringlengths 63 8.54k | code_length int64 11 747 |
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# Write a Python program to format a specified string limiting the length of a string.
str_num = "1234567890"
print("Original string:",str_num)
print('%.6s' % str_num)
print('%.9s' % str_num)
print('%.10s' % str_num)
| 30 |
# Getting all CSV files from a directory using Python
# importing the required modules
import glob
import pandas as pd
# specifying the path to csv files
path = "csvfoldergfg"
# csv files in the path
files = glob.glob(path + "/*.csv")
# defining an empty list to store
# content
data_frame = pd.DataFrame()
c... | 95 |
# Write a Python Program for ShellSort
# Python program for implementation of Shell Sort
def shellSort(arr):
# Start with a big gap, then reduce the gap
n = len(arr)
gap = n/2
# Do a gapped insertion sort for this gap size.
# The first gap elements a[0..gap-1] are already in gapped
#... | 193 |
# Write a Python program to generate all sublists of a list.
from itertools import combinations
def sub_lists(my_list):
subs = []
for i in range(0, len(my_list)+1):
temp = [list(x) for x in combinations(my_list, i)]
if len(temp)>0:
subs.extend(temp)
return subs
l1 = [10, 20, 30, 40]
l2 = ['X', 'Y', '... | 70 |
# Write a Python program to extract year, month and date value from current datetime using arrow module.
import arrow
a = arrow.utcnow()
print("Year:")
print(a.year)
print("\nMonth:")
print(a.month)
print("\nDate:")
print(a.day)
| 29 |
# Write a Python program to convert all the characters in uppercase and lowercase and eliminate duplicate letters from a given sequence. Use map() function.
def change_cases(s):
return str(s).upper(), str(s).lower()
chrars = {'a', 'b', 'E', 'f', 'a', 'i', 'o', 'U', 'a'}
print("Original Characters:\n",chrars)
r... | 60 |
# Write a NumPy program to replace a specific character with another in a given array of string values.
import numpy as np
str1 = np.array([['Python-NumPy-Exercises'],
['-Python-']])
print("Original array of string values:")
print(str1)
print("\nReplace '-' with '=' character in the said array of st... | 65 |
# Write a NumPy program to create an array which looks like below array.
import numpy as np
x = np.triu(np.arange(2, 14).reshape(4, 3), -1)
print(x)
| 25 |
# Write a Python program to read a square matrix from console and print the sum of matrix primary diagonal. Accept the size of the square matrix and elements for each column separated with a space (for every row) as input from the user.
size = int(input("Input the size of the matrix: "))
matrix = [[0] * size for row... | 101 |
# Write a Python program to interleave two given list into another list randomly using map() function.
import random
def randomly_interleave(nums1, nums2):
result = list(map(next, random.sample([iter(nums1)]*len(nums1) + [iter(nums2)]*len(nums2), len(nums1)+len(nums2))))
return result
nums1 = [1,2,7,8,3,7]
... | 51 |
# Write a Python program to Remove Tuples from the List having every element as None
# Python3 code to demonstrate working of
# Remove None Tuples from List
# Using all() + list comprehension
# initializing list
test_list = [(None, 2), (None, None), (3, 4), (12, 3), (None, )]
# printing original list
print("Th... | 96 |
# Write a Python program to multiply all the numbers in a given list using lambda.
from functools import reduce
def mutiple_list(nums):
result = reduce(lambda x, y: x*y, nums)
return result
nums = [4, 3, 2, 2, -1, 18]
print ("Original list: ")
print(nums)
print("Mmultiply all the numbers of the said list:"... | 74 |
# Write a NumPy program to print all the values of an array.
import numpy as np
np.set_printoptions(threshold=np.nan)
x = np.zeros((4, 4))
print(x)
| 23 |
# Write a Python program to alter the owner and the group id of a specified file.
import os
fd = os.open( "/tmp", os.O_RDONLY )
os.fchown( fd, 100, -1)
os.fchown( fd, -1, 50)
print("Changed ownership successfully..")
os.close( fd )
| 39 |
# Minimum difference between two elements in an array
import sysarr=[]size = int(input("Enter the size of the array: "))print("Enter the Element of the array:")for i in range(0,size): num = int(input()) arr.append(num)Min_diff=sys.maxsizefor i in range(0,size-1): for j in range(i+1, size): if abs(arr[... | 52 |
# Write a Python program to Replace NaN values with average of columns
# Python code to demonstrate
# to replace nan values
# with an average of columns
import numpy as np
# Initialising numpy array
ini_array = np.array([[1.3, 2.5, 3.6, np.nan],
[2.6, 3.3, np.nan, 5.5],
... | 106 |
# Maximum of two numbers in Python
# Python program to find the
# maximum of two numbers
def maximum(a, b):
if a >= b:
return a
else:
return b
# Driver code
a = 2
b = 4
print(maximum(a, b)) | 41 |
# Write a Pandas program to convert index of a given dataframe into a column.
import pandas as pd
df = pd.DataFrame({
'school_code': ['s001','s002','s003','s001','s002','s004'],
'class': ['V', 'V', 'VI', 'VI', 'V', 'VI'],
'name': ['Alberto Franco','Gino Mcneill','Ryan Parkes', 'Eesha Hinton', 'Gino Mcnei... | 74 |
# Isoformat to datetime – Python
# importing datetime module
from datetime import datetime
# Getting today's date
todays_Date = datetime.now()
# Get date into the isoformat
isoformat_date = todays_Date.isoformat()
# print the type of date
print(type(isoformat_date))
# convert string date into datetime for... | 48 |
# Write a NumPy program to create an array of ones and an array of zeros.
import numpy as np
print("Create an array of zeros")
x = np.zeros((1,2))
print("Default type is float")
print(x)
print("Type changes to int")
x = np.zeros((1,2), dtype = np.int)
print(x)
print("Create an array of ones")
y= np.ones((1,2))
prin... | 67 |
# Write a Pandas program to create a yearly time period from a specified year and display the properties of this period.
import pandas as pd
ytp = pd.Period('2020','A-DEC')
print("Yearly time perid:",ytp)
print("\nAll the properties of the said period:")
print(dir(ytp))
| 40 |
# Write a Pandas program to remove the duplicates from 'WHO region' column of World alcohol consumption dataset.
import pandas as pd
# World alcohol consumption data
w_a_con = pd.read_csv('world_alcohol.csv')
print("World alcohol consumption sample data:")
print(w_a_con.head())
print("\nAfter removing the duplicate... | 46 |
#
Please write a program using generator to print the numbers which can be divisible by 5 and 7 between 0 and n in comma separated form while n is input by console.
def NumGenerator(n):
for i in range(n+1):
if i%5==0 and i%7==0:
yield i
n=int(raw_input())
values = []
for i in NumGenerator(... | 56 |
# Write a Python program to Convert JSON to string
import json
# create a sample json
a = {"name" : "GeeksforGeeks", "Topic" : "Json to String", "Method": 1}
# Convert JSON to String
y = json.dumps(a)
print(y)
print(type(y)) | 39 |
# Write a Python program to use double quotes to display strings.
import json
print(json.dumps({'Alex': 1, 'Suresh': 2, 'Agnessa': 3}))
| 20 |
# Write a NumPy program to sort a given array by row and column in ascending order.
import numpy as np
nums = np.array([[5.54, 3.38, 7.99],
[3.54, 4.38, 6.99],
[1.54, 2.39, 9.29]])
print("Original array:")
print(nums)
print("\nSort the said array by row in ascending order:")
print(np.so... | 56 |
# Write a Python function to reverses a string if it's length is a multiple of 4.
def reverse_string(str1):
if len(str1) % 4 == 0:
return ''.join(reversed(str1))
return str1
print(reverse_string('abcd'))
print(reverse_string('python'))
| 31 |
# Write a Python program to Convert Tuple Matrix to Tuple List
# Python3 code to demonstrate working of
# Convert Tuple Matrix to Tuple List
# Using list comprehension + zip()
# initializing list
test_list = [[(4, 5), (7, 8)], [(10, 13), (18, 17)], [(0, 4), (10, 1)]]
# printing original list
print("The origina... | 94 |
# Write a Python program to add leading zeroes to a string.
str1='122.22'
print("Original String: ",str1)
print("\nAdded trailing zeros:")
str1 = str1.ljust(8, '0')
print(str1)
str1 = str1.ljust(10, '0')
print(str1)
print("\nAdded leading zeros:")
str1='122.22'
str1 = str1.rjust(8, '0')
print(str1)
str1 = str1.rjust... | 43 |
# Write a NumPy program to make all the elements of a given string to a numeric string of 5 digits with zeros on its left.
import numpy as np
x = np.array(['2', '11', '234', '1234', '12345'], dtype=np.str)
print("\nOriginal Array:")
print(x)
r = np.char.zfill(x, 5)
print("\nNumeric string of 5 digits with zeros:")
p... | 53 |
# Write a Python program which iterates the integers from 1 to a given number and print "Fizz" for multiples of three, print "Buzz" for multiples of five, print "FizzBuzz" for multiples of both three and five using itertools module.
#Source:https://bit.ly/30PS62m
import itertools as it
def fizz_buzz(n):
fizzes... | 93 |
# Write a Pandas program to convert year and day of year into a single datetime column of a dataframe.
import pandas as pd
data = {\
"year": [2002, 2003, 2015, 2018],
"day_of_the_year": [250, 365, 1, 140]
}
df = pd.DataFrame(data)
print("Original DataFrame:")
print(df)
df["combined"] = df["year"]*1000 + df["day_of_th... | 58 |
# How to Change a Dictionary Into a Class in Python
# Turns a dictionary into a class
class Dict2Class(object):
def __init__(self, my_dict):
for key in my_dict:
setattr(self, key, my_dict[key])
# Driver Code
if __name__ == "__main__":
# Creating the dictionary
... | 67 |
# Write a NumPy program to compute the x and y coordinates for points on a sine curve and plot the points using matplotlib.
import numpy as np
import matplotlib.pyplot as plt
# Compute the x and y coordinates for points on a sine curve
x = np.arange(0, 3 * np.pi, 0.2)
y = np.sin(x)
print("Plot the points using matpl... | 63 |
# Write a Python Program to Reverse a linked list
# Python program to reverse a linked list
# Time Complexity : O(n)
# Space Complexity : O(n) as 'next'
#variable is getting created in each loop.
# Node class
class Node:
# Constructor to initialize the node object
def __init__(self, data):
sel... | 179 |
# Write a NumPy program to change the data type of an array.
import numpy as np
x = np.array([[2, 4, 6], [6, 8, 10]], np.int32)
print(x)
print("Data type of the array x is:",x.dtype)
# Change the data type of x
y = x.astype(float)
print("New Type: ",y.dtype)
print(y)
| 48 |
# Count distinct substrings of a string using Rabin Karp algorithm in Python
# importing libraries
import sys
import math as mt
t = 1
# store prime to reduce overflow
mod = 9007199254740881
for ___ in range(t):
# string to check number of distinct substring
s = 'abcd'
# to store substrings
l = [... | 137 |
#
7.2
Define a class named Rectangle which can be constructed by a length and width. The Rectangle class has a method which can compute the area.
:
class Rectangle(object):
def __init__(self, l, w):
self.length = l
self.width = w
def area(self):
return self.length*self.width
aR... | 49 |
# Write a Python program to swap two sublists in a given list.
nums = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
print("Original list:")
print(nums)
nums[6:10], nums[1:3] = nums[1:3], nums[6:10]
print("\nSwap two sublists of the said list:")
print(nums)
nums[1:3], nums[4:6] = nums[4:6], nums[1:3]
print("... | 60 |
# Longest palindromic substring in a string
def reverse(s): str = "" for i in s: str = i + str return strstr=input("Enter Your String:")sub_str=str.split(" ")sub_str1=[]p=0flag=0maxInd=0max=0str_rev=""print("Palindrome Substring are:")for inn in range(len(sub_str)): str_rev= sub_str[inn] if reverse(str_re... | 69 |
# Write a Python program to find all the h2 tags and list the first four from the webpage python.org.
import requests
from bs4 import BeautifulSoup
url = 'https://www.python.org/'
reqs = requests.get(url)
soup = BeautifulSoup(reqs.text, 'lxml')
print("First four h2 tags from the webpage python.org.:")
print(soup.fin... | 45 |
# Write a NumPy program to set zero to lower triangles along the last two axes of a three-dimensional of a given array.
import numpy as np
arra=np.ones((1,8,8))
print("Original array:")
print(arra)
result = np.triu(arra, k=1)
print("\nResult:")
print(result)
| 37 |
# How to add time onto a DateTime object in Python
# Python3 code to illustrate the addition
# of time onto the datetime object
# Importing datetime
import datetime
# Initializing a date and time
date_and_time = datetime.datetime(2021, 8, 22, 11, 2, 5)
print("Original time:")
print(date_and_time)
# Callin... | 69 |
# Write a Python program to print the first n Lucky Numbers.
n=int(input("Input a Number: "))
List=range(-1,n*n+9,2)
i=2
while List[i:]:List=sorted(set(List)-set(List[List[i]::List[i]]));i+=1
print(List[1:n+1])
| 21 |
# Write a Python program to sort a list of elements using the insertion sort algorithm.
def insertionSort(nlist):
for index in range(1,len(nlist)):
currentvalue = nlist[index]
position = index
while position>0 and nlist[position-1]>currentvalue:
nlist[position]=nlist[position-1]
... | 42 |
# rite a Python program that accepts a sequence of lines (blank line to terminate) as input and prints the lines as output (all characters in lower case).
lines = []
while True:
l = input()
if l:
lines.append(l.upper())
else:
break;
for l in lines:
print(l)
| 46 |
# How to get element-wise true division of an array using Numpy in Python
# import library
import numpy as np
# create 1d-array
x = np.arange(5)
print("Original array:",
x)
# apply true division
# on each array element
rslt = np.true_divide(x, 4)
print("After the element-wise division:",
rs... | 48 |
# Select any row from a Dataframe using iloc[] and iat[] in Pandas in Python
import pandas as pd
# Create the dataframe
df = pd.DataFrame({'Date':['10/2/2011', '11/2/2011', '12/2/2011', '13/2/11'],
'Event':['Music', 'Poetry', 'Theatre', 'Comedy'],
'Cost':[10000, 5000, 15000... | 77 |
# How to create filename containing date or time in Python
# import module
from datetime import datetime
# get current date and time
current_datetime = datetime.now()
print("Current date & time : ", current_datetime)
# convert datetime obj to string
str_current_datetime = str(current_datetime)
# create a fil... | 64 |
# Saving a Networkx graph in GEXF format and visualize using Gephi in Python
# importing the required module
import networkx as nx
# making a simple graph with 1 node.
G = nx.path_graph(10)
# saving graph created above in gexf format
nx.write_gexf(G, "geeksforgeeks.gexf") | 44 |
# Write a Python program to generate a list of numbers in the arithmetic progression starting with the given positive integer and up to the specified limit.
def arithmetic_progression(n, x):
return list(range(n, x + 1, n))
print(arithmetic_progression(1, 15))
print(arithmetic_progression(3, 37))
print(arithmetic_... | 42 |
# Write a Python program to get the current value of the recursion limit.
import sys
print()
print("Current value of the recursion limit:")
print(sys.getrecursionlimit())
print()
| 25 |
# Python Program to Find the Total Sum of a Nested List Using Recursion
def sum1(lst):
total = 0
for element in lst:
if (type(element) == type([])):
total = total + sum1(element)
else:
total = total + element
return total
print( "Sum is:",sum1([[1,2],[3,4]])) | 43 |
# Write a Python program to extract every first or specified element from a given two-dimensional list.
def specified_element(nums, N):
result = [i[N] for i in nums]
return result
nums = [
[1,2,3,2],
[4,5,6,2],
[7,1,9,5],
]
print("Original list of lists:")
print(nums)... | 73 |
# Write a Python program to create multiple lists.
obj = {}
for i in range(1, 21):
obj[str(i)] = []
print(obj)
| 21 |
# Write a Python program to combines two or more dictionaries, creating a list of values for each key.
from collections import defaultdict
def test(*dicts):
result = defaultdict(list)
for el in dicts:
for key in el:
result[key].append(el[key])
return dict(result)
d1 = {'w': 50, 'x': 100, 'y': 'Gree... | 73 |
# Program to check whether number is Spy Number or Not
num=int(input("Enter a number:"))
sum=0
mult=1
while num!=0:
rem = num % 10
sum += rem
mult *= rem
num //= 10
if sum==mult:
print("It is a spy Number.")
else:
print("It is not a spy Number.") | 46 |
# How to compute the eigenvalues and right eigenvectors of a given square array using NumPY in Python
# importing numpy library
import numpy as np
# create numpy 2d-array
m = np.array([[1, 2],
[2, 3]])
print("Printing the Original square array:\n",
m)
# finding eigenvalues and eigenvector... | 78 |
# Write a Python program to find the minimum, maximum value for each tuple position in a given list of tuples.
def max_min_list_tuples(nums):
zip(*nums)
result1 = map(max, zip(*nums))
result2 = map(min, zip(*nums))
return list(result1), list(result2)
nums = [(2,3),(2,4),(0,6),(7,1)]
print("Original ... | 70 |
# Python Program to Reverse a Stack using Recursion
class Stack:
def __init__(self):
self.items = []
def is_empty(self):
return self.items == []
def push(self, data):
self.items.append(data)
def pop(self):
return self.items.pop()
def display(self):
f... | 85 |
# Write a Pandas program to drop the columns where at least one element is missing in a given DataFrame.
import pandas as pd
import numpy as np
pd.set_option('display.max_rows', None)
#pd.set_option('display.max_columns', None)
df = pd.DataFrame({
'ord_no':[70001,np.nan,70002,70004,np.nan,70005,np.nan,70010,70003,70... | 60 |
# Pandas | Basic of Time Series Manipulation in Python
import pandas as pd
from datetime import datetime
import numpy as np
range_date = pd.date_range(start ='1/1/2019', end ='1/08/2019',
freq ='Min')
print(range_date) | 31 |
# Write a Pandas program to get the items of a given series not present in another given series.
import pandas as pd
sr1 = pd.Series([1, 2, 3, 4, 5])
sr2 = pd.Series([2, 4, 6, 8, 10])
print("Original Series:")
print("sr1:")
print(sr1)
print("sr2:")
print(sr2)
print("\nItems of sr1 not present in sr2:")
result = sr1[... | 54 |
# Check if element exists in list in Python
# Python code to demonstrate
# checking of element existence
# using loops and in
# Initializing list
test_list = [ 1, 6, 3, 5, 3, 4 ]
print("Checking if 4 exists in list ( using loop ) : ")
# Checking if 4 exists in list
# using loop
for i in test_list:
if(i == 4... | 99 |
# Write a Python program to calculate arc length of an angle.
def arclength():
pi=22/7
diameter = float(input('Diameter of circle: '))
angle = float(input('angle measure: '))
if angle >= 360:
print("Angle is not possible")
return
arc_length = (pi*diameter) * (angle/360)
print(... | 46 |
# Write a Python program to construct a Decimal from a float and a Decimal from a string. Also represent the Decimal value as a tuple. Use decimal.Decimal
import decimal
print("Construct a Decimal from a float:")
pi_val = decimal.Decimal(3.14159)
print(pi_val)
print(pi_val.as_tuple())
print("\nConstruct a Decimal fro... | 52 |
# Write a NumPy program to test a given array element-wise for finiteness (not infinity or not a Number).
import numpy as np
a = np.array([1, 0, np.nan, np.inf])
print("Original array")
print(a)
print("Test a given array element-wise for finiteness :")
print(np.isfinite(a))
| 41 |
# Write a NumPy program to create a white image of size 512x256.
from PIL import Image
import numpy as np
a = np.full((512, 256, 3), 255, dtype=np.uint8)
image = Image.fromarray(a, "RGB")
image.save("white.png", "PNG")
| 34 |
# Python Program to Compute Prime Factors of an Integer
n=int(input("Enter an integer:"))
print("Factors are:")
i=1
while(i<=n):
k=0
if(n%i==0):
j=1
while(j<=i):
if(i%j==0):
k=k+1
j=j+1
if(k==2):
print(i)
i=i+1 | 27 |
# Write a Python program to Convert numeric words to numbers
# Python3 code to demonstrate working of
# Convert numeric words to numbers
# Using join() + split()
help_dict = {
'one': '1',
'two': '2',
'three': '3',
'four': '4',
'five': '5',
'six': '6',
'seven': '7',
'eight': '8',
... | 105 |
# Write a Python function to get a string made of its first three characters of a specified string. If the length of the string is less than 3 then return the original string.
def first_three(str):
return str[:3] if len(str) > 3 else str
print(first_three('ipy'))
print(first_three('python'))
print(first_three('py'... | 47 |
# Write a Pandas program to set value in a specific cell in a given dataframe using index.
import pandas as pd
df = pd.DataFrame({
'school_code': ['s001','s002','s003','s001','s002','s004'],
'class': ['V', 'V', 'VI', 'VI', 'V', 'VI'],
'name': ['Alberto Franco','Gino Mcneill','Ryan Parkes', 'Eesha Hinton'... | 88 |
# Program to compute the perimeter of Trapezoid
print("Enter the value of base:")
a=int(input())
b=int(input())
print("Enter the value of side:")
c=int(input())
d=int(input())
perimeter=a+b+c+d
print("Perimeter of the Trapezoid = ",perimeter)
| 29 |
# Maximum difference between two elements in an array
import sysarr=[]size = int(input("Enter the size of the array: "))print("Enter the Element of the array:")for i in range(0,size): num = int(input()) arr.append(num)Max_diff=-sys.maxsize-1for i in range(0,size-1): for j in range(i+1, size): if abs(a... | 52 |
# Create two arrays of six elements. Write a NumPy program to count the number of instances of a value occurring in one array on the condition of another array.
import numpy as np
x = np.array([10,-10,10,-10,-10,10])
y = np.array([.85,.45,.9,.8,.12,.6])
print("Original arrays:")
print(x)
print(y)
result = np.sum((x ... | 70 |
# Program to Print the Hollow Half Pyramid Star Pattern
row_size=int(input("Enter the row size:"))print_control_x=row_size//2+1for out in range(1,row_size+1): for inn in range(1,row_size+1): if inn==1 or out==inn or out==row_size: print("*",end="") else: print(" ", end="") pr... | 33 |
# Write a Pandas program to create a series of Timestamps from a DataFrame of integer or string columns. Also create a series of Timestamps using specified columns.
import pandas as pd
df = pd.DataFrame({'year': [2018, 2019, 2020],
'month': [2, 3, 4],
'day': [4, 5, 6],
... | 73 |
# Difference between List comprehension and Lambda in Python
lst = [x ** 2 for x in range (1, 11) if x % 2 == 1]
print(lst) | 27 |
# Pretty print Linked List in Python
class Node:
def __init__(self, val=None):
self.val = val
self.next = None
class LinkedList:
def __init__(self, head=None):
self.head = head
def __str__(self):
# defining a blank res variable
res = ""
... | 143 |
# numpy string operations | not_equal() function in Python
# Python program explaining
# numpy.char.not_equal() method
# importing numpy
import numpy as geek
# input arrays
in_arr1 = geek.array('numpy')
print ("1st Input array : ", in_arr1)
in_arr2 = geek.array('nump')
print ("2nd Input array : ", in_arr... | 62 |
# Write a Pandas program to create a time series object that has time indexed data. Also select the dates of same year and select the dates between certain dates.
import pandas as pd
index = pd.DatetimeIndex(['2011-09-02', '2012-08-04',
'2015-09-03', '2010-08-04',
... | 73 |
# Write a NumPy program to create two arrays with shape (300,400, 5), fill values using unsigned integer (0 to 255). Insert a new axis that will appear at the beginning in the expanded array shape. Now combine the said two arrays into one.
import numpy as np
nums1 = np.random.randint(low=0, high=256, size=(200, 300... | 84 |
# Write a Python program to convert any base to decimal by using int() method
# Python program to convert any base
# number to its corresponding decimal
# number
# Function to convert any base number
# to its corresponding decimal number
def any_base_to_decimal(number, base):
# calling the builtin funct... | 104 |
# Write a Python program to change a given string to a new string where the first and last chars have been exchanged.
def change_sring(str1):
return str1[-1:] + str1[1:-1] + str1[:1]
print(change_sring('abcd'))
print(change_sring('12345'))
| 33 |
# Write a NumPy program to create to concatenate two given arrays of shape (2, 2) and (2,1).
import numpy as np
nums1 = np.array([[4.5, 3.5],
[5.1, 2.3]])
nums2 = np.array([[1],
[2]])
print("Original arrays:")
print(nums1)
print(nums2)
print("\nConcatenating the said two arrays:")... | 44 |
# Write a Python program to create a doubly linked list, append some items and iterate through the list (print forward).
class Node(object):
# Doubly linked node
def __init__(self, data=None, next=None, prev=None):
self.data = data
self.next = next
self.prev = prev
class doubly_linke... | 131 |
# Write a Pandas program to create a Pivot table and calculate number of women and men were in a particular cabin class.
import pandas as pd
import numpy as np
df = pd.read_csv('titanic.csv')
result = df.pivot_table(index=['sex'], columns=['pclass'], aggfunc='count')
print(result)
| 40 |
# Write a Python program to list the tables of given SQLite database file.
import sqlite3
from sqlite3 import Error
def sql_connection():
try:
conn = sqlite3.connect('mydatabase.db')
return conn
except Error:
print(Error)
def sql_table(conn):
cursorObj = conn.cursor()
# Create two tables
... | 81 |
# Find out all Perfect numbers present within a given range
'''Write a Python
program to find out all Perfect numbers present within a given range.
or Write a program to find out all Perfect numbers present
within a given range using Python '''
print("Enter a range:")
range1=int(input())
range2=int(input())
prin... | 73 |
# Write a Python program to find the first repeated character in a given string.
def first_repeated_char(str1):
for index,c in enumerate(str1):
if str1[:index+1].count(c) > 1:
return c
return "None"
print(first_repeated_char("abcdabcd"))
print(first_repeated_char("abcd"))
| 31 |
# Write a Python program to concatenate all elements in a list into a string and return it.
def concatenate_list_data(list):
result= ''
for element in list:
result += str(element)
return result
print(concatenate_list_data([1, 5, 12, 2]))
| 35 |
# Program to check whether a matrix is symmetric or not
# Get size of matrix
row_size=int(input("Enter the row Size Of the Matrix:"))
col_size=int(input("Enter the columns Size Of the Matrix:"))
matrix=[]
# Taking input of the 1st matrix
print("Enter the Matrix Element:")
for i in range(row_size):
matrix.append(... | 136 |
# Write a NumPy program to create a vector of size 10 with values ranging from 0 to 1, both excluded.
import numpy as np
x = np.linspace(0,1,12,endpoint=True)[1:-1]
print(x)
| 29 |
# Write a Python program to print a given doubly linked list in reverse order.
class Node(object):
# Singly linked node
def __init__(self, data=None, next=None, prev=None):
self.data = data
self.next = next
self.prev = prev
class doubly_linked_list(object):
def __init__(self):
... | 156 |
# Write a Python program to split values into two groups, based on the result of the given filtering function.
def bifurcate_by(lst, fn):
return [
[x for x in lst if fn(x)],
[x for x in lst if not fn(x)]
]
print(bifurcate_by(['red', 'green', 'black', 'white'], lambda x: x[0] == 'w'))
| 50 |
# Write a Pandas program to get the index of an element of a given Series.
import pandas as pd
ds = pd.Series([1,3,5,7,9,11,13,15], index=[0,1,2,3,4,5,7,8])
print("Original Series:")
print(ds)
print("\nIndex of 11 in the said series:")
x = ds[ds == 11].index[0]
print(x)
| 40 |
# Write a Python program to Maximum record value key in dictionary
# Python3 code to demonstrate working of
# Maximum record value key in dictionary
# Using loop
# initializing dictionary
test_dict = {'gfg' : {'Manjeet' : 5, 'Himani' : 10},
'is' : {'Manjeet' : 8, 'Himani' : 9},
'best' : ... | 118 |
# Write a Python program to print a long text, convert the string to a list and print all the words and their frequencies.
string_words = '''United States Declaration of Independence
From Wikipedia, the free encyclopedia
The United States Declaration of Independence is the statement
adopted by the Second Continental... | 673 |
# Write a Python program to replace a given tag with whatever's inside a given tag.
from bs4 import BeautifulSoup
markup = '<a href="https://w3resource.com/">Python exercises.<i>w3resource.com</i></a>'
soup = BeautifulSoup(markup, "lxml")
a_tag = soup.a
print("Original markup:")
print(a_tag)
a_tag.i.unwrap()
print("... | 39 |
# Creating a dataframe from Pandas series in Python
import pandas as pd
import matplotlib.pyplot as plt
author = ['Jitender', 'Purnima', 'Arpit', 'Jyoti']
auth_series = pd.Series(author)
print(auth_series) | 27 |
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