Python Fundamental Week 1 Cheat Sheet

A Programming › Python cheat sheet in English by hangvtk7777

Syntax related to Python Fundamental (Week 1)

Python

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Python Basic & Data Structure

VARIABLE ASSIGNMENT & DATA TYPE DETECTION

create a variable

full = 1

data type detection

print (type(variable_name))

PYTHON LIST

create a list

my_list = ["my", "list", 0, 1 ]

getting elements in a list

x = ["a", "b", "c", "d"]

x[1]

x[-3] # same result!

slicing & dicing

my_list[start:end]

manipulating a list (update)

fam = ["liz", 1.73, "emma",2]

fam[3] = 1.86

manipulating a list (remove)

del(fam[2]) # Remove "emma"

manipulating a list (add element)

x = ["a", "b", "c", "d"]

y = x + ["e", "f"]

PYTHON SET

create a set

myset = {"apple", "banana", "cherry"}

PYTHON TUPLE

create a tuple

mytuple = ("apple", "banana", "cherry")

getting elements in a tuple

mytuple[1]

slicing & dicing in a tuple

mytuple[start:end]

Python Loop

For: lặp đúng bằng số lần của tập hợp, danh sách

fruits = ["apple", "banana", "cherry","strawberry"]

for i in fruits:

print(i)

While: cho đến khi condition = True

i = 0

while i < 6:

i= i + 2

print(i)

Python if else condition

Phân biệt Python if elif và (multiple) if condition

Data Structure (Dictionary)

PYTHON DICTIONARY

create dictionary

d1 = {1: 'Geeks', 2: 'For', 3: 'Geeks'} # create dictionary using { }

k = ["Fruits", "Vegetables", "Drinks"]

val = [["Apple", "Banana"], ["Carrot", "Spinach"], ["Water", "Juice"]]

d = dict(zip(k, val)) print(d) # create a dictionary of lists using zip

get list of values, keys

dictionary_name.values()

dictionary_name.keys()

access specific value of key

dictionary_name['specific_key']

dictionary manipulation (add key & value)

dictionary_name['new_key'] = 'new_value'

dictionary update / remove key

dictionary_name['key_to_update'] = 'value_to_update'

del dictionary_name['key_to_remove']

Data Structure (String)

PYTHON STRING

create a string

s = "GfG"

access character in string

s[1]

string slicing

s[start : end]

common string methods (len of string)

s = "GeeksforGeeks"

print(len(s))

# output: 13

common string methods (upper, lower)

s = "Hello World"

print(s.upper()) # output: HELLO WORLD

print(s.lower()) # output: hello world

common string methods (strip)

s = " Gfg "

print(s.strip()) # remove space from s

# output: Gfg

another string methods

reference to this link: https://www.w3schools.com/python/python_ref_string.asp

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