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Python Fundamental Week 1 Cheat Sheet by

Syntax related to Python Fundamental (Week 1)

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
 

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  • Published: 18th February, 2025

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