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Performing HTTP requests in Python using urllib # Import packages from urllib.request import urlopen, Request # Specify the url url = "http://www.datacamp.com/teach/documentation" # This packages th...

from csv import reader potus = list(reader(open(‘potus_visitors_2015.csv’)))

An object is an entity that stores data. An object’s class defines specific properties objects of that class will have.


字符串输出 name = "Kylie" num = 8 output = name + "'s favorite number is " + str(num) print(output) Kylie’s favorite number is 8 str.format() method 输出 1. The variables are inserted into the {} by the or...

fruit = ['orange', 'orange', 'orange', 'banana', 'apple', 'banana', 'orange', 'banana', 'apple', 'banana'] fruit_frequency = {} for f in fruit: if f not in fruit_freque...

list comprehensions # Create a 5 x 5 matrix using a list of lists: matrix matrix = [[col for col in range(5)] for row in range(5)] # Print the matrix for row in matrix: print(row) [0, 1, 2, 3, ...

enumerate() returns an enumerate object that produces a sequence of tuples, and each of the tuples is an index-value pair. # Create a list of strings: mutants mutants = ['charles xavier', ...

Count the number of Duplicates Write a function that will return the count of distinct case-insensitive alphabetic characters and numeric digits that occur more than once in the input string. The inpu...

import builtins dir(builtins)