Python Flashcards
value = 42
print(f’{value=}’)
value=42
*=
+=
-=
/=
%=
**=
meghdaro hesab mikona mirize dakhele khode var
def func(a, b, /):
ghable / hame bayad positional bashan va nemitoona keyword begiran. ba dashtane meghdare default tanaghozi nadare
old version of def func(x: int | str):
from typing import Union
def func(x: Union[int , str]):
s = ‘TestString’
remove Test from beginnign
s = s.removeprefix(‘Testr’)
s = tavajoh kon
age aval ya akharessh nadashte bashe chi mishe?
baraye removeprefix va removesuffix
hichi, error nemide. kalame khodesh mimune
s = ‘TestString’
remove ing from last part of word
s = s.removesuffix(‘ing’)
s = tavajoh kon
class Solution:
def merge(self, nums1: List[int], m: int, nums2: List[int], n: int) -> None:
nums1 = [nums2[i - n] if not j else j for i, j in enumerate(nums1)]
what is nums1?
nums1 will not changed
how to change list in place inside of a function/method?
change elements
nums1[m:]=nums2
nums1[m:]=nums2[:n]
these are changing elements?
Yes. both of them
k%=10 ?
1- k=k%10
2- k = 10% k
1- k=k%10
roman_dyn = {“IV”: 4, “IX”: 9, “XL”: 40, “XC”: 90, “CD”: 400, “CM”: 900}
for i, j in roman_dyn.values():
or
for I, j in roman_dyn.items(): ?
for I, j in roman_dyn.items():
s = s.replace(i,””)
or s.replace(i,””)
s = s.replace(i,””)
a=” fly me to the moon “
print(a.strip())
space ro az 2 taraf pak mikone
a=” fly me to the moon “
print(a.split())
[‘fly’, ‘me’, ‘to’, ‘the’, ‘moon’]
