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Python Cheat Sheet - Keywords “ A puzzle a day to learn, code, and play ” → Visit f inxter.com Keyword Description Code example False , True Data values from the data type Boolean False == ( 1 > 2 ), True == ( 2 > 1 ) and , or , not Logical operators:
The keys method returns all keys in a dictionary, the values method returns all values in a dictionary and items method returns all key-value pairs in a dictionary. > a.keys() ['x', 'y', 'z'] > a.values() [1, 2, 3] > a.items() [('x', 1), ('y', 2), ('z', 3)] The for statement can be used to iterate over a dictionary.
Global and Local Variables in Python. Global variables are the one that are defined and declared outside a function and we need to use them inside a function. # This function uses global variable s def f(): print s. # Global scope. s = "I love Geeksforgeeks" f()
Check with the inkeyword if set, list, or dictionary contains an element. Set membership is faster than list membership. basket = {'apple' , 'eggs' 'banana ', 'orange } print('eggs' in basket) # True print('mushroom' in basket) # False List & set comprehe nsion List comprehension is the concise Python way to create lists. Use brackets plus an
Python Cheat Sheet - Keywords “ A puzzle a day to learn, code, and pla y” → Visit f inxter.com Keyword Description Code example False , True Boolean data types False == ( 1 > 2 ), True == ( 2 > 1 ) None Empty value constant def f () : x = 2
language keywords forbidden lower/UPPER case discrimination ☝ expression with only comas →tuple dictionary collection integer, float, boolean, string, bytes Identifiers ☺ a toto x7 y_max BigOne ☹ 8y and for x+=3 x-=2 increment ⇔ x=x+3 decrement ⇔ x=x-2 Conversions for lists, tuples, strings, bytes… int("15") → 15
Python Crash Course is a fast-paced, thorough intro- duction to programming with Python that will have you. writing programs, solving problems, and making things. In the first half of the book,...
