Python - UzanR/UzCodingNewLife GitHub Wiki
Return the number of bits necessary to represent an integer in binary
n = 9 #1001 n.bit_length() = 4
Check object is type or not
n = 9.1 isinstance(n, int) #False
temp = arr[i] arr[i] = arr[i+1] arr[i+1] = temp
shorten
arr[i],arr[i+1] = arr[i+1],arr[i]
str = ' hello uzanr' str.strip() >>> 'hello uzanr'
str = ' hello uzanr'
str.replace(' ','')
>>> 'hellpuzanr'
str = 'hello uzanr' " ".join(str.split()) >>> 'hello uzanr'
str = 'This is an example feedback' textwrap.wrap(feedback, size, break_long_words=False) >>> ["This is","an","example","feedback"]
key = "zabcdefghijklmnopqrstuvwxy"
password = "iamthebest"
table = str.maketrans("abcdefghijklmnopqrstuvwxyz", key)
return password.translate(table)
>>> "hzlsgdadrs"
document = "Todd told Tom to trot to the timber" list(set(document)) >>> [' ', 'T', 'b', 'd', 'e', 'h', 'i', 'l', 'm', 'o', 'r', 't']
|Number |Format |Output |Description |
|------------|-----------|-----------|----------------------------------------------|
|3.1415926 |{:.2f} |3.14 |2 decimal places |
|3.1415926 |{:+.2f} |+3.14 |2 decimal places with sign |
|-1 |{:+.2f} |-1.00 |2 decimal places with sign |
|2.71828 |{:.0f} |3 |No decimal places |
|5 |{:0>2d} |05 |Pad number with zeros (left padding, width 2) |
|5 |{:x<4d} |5xxx |Pad number with x’s (right padding, width 4) |
|10 |{:x<4d} |10xx |Pad number with x’s (right padding, width 4) |
|1000000 |{:,} |1,000,000 |Number format with comma separator |
|0.25 |{:.2%} |25% |Format percentage |
|1000000000 |{:.2e} |1.00e+09 |Exponent notation |
|13 |{:10d} | 13 |Right aligned (default, width 10) |
|13 |{:<10d} |13 |Left aligned (width 10) |
|13 |{:^10d} | 13 |Center aligned (width 10) |
s1 = "{0} is better than {1}".format("python","php")
>>> python is better than php
s1 = "{user} uses {lang}".format(user="UzanR", lang="Python")
>>> UzanR uses Python
myf = "My language is {lang}".format
myf(lang="python")
>>> My language is python
a = [1,2,3] b = [4,5] c = a.append(b) >>> [1, 2, 3, [4, 5]]
a = [1,2,3] b = [4,5] c = a.extend(b) >>> [1, 2, 3, 4, 5]
arr = [1,2,3,4,5,6] arr[0::2] >>> [1,3,5] arr[1::2] >>> [2,4,6]
-- normal way
count = 0
for i in L:
if count%2 == 0:
odd.append(i)
else:
even.append(i)
count += 1
-- using emumerate
for count, i in emuerate(L):
if count%2 == 0:
odd.append(i)
else:
even.append(i)
a = [[i*j for j in range(1,n+1)] for i in range(1,n+1)]
for arr1 in a:
for arr2 in arr1:
print(arr1)
for i in range(len(arr)):
for j in range(i, len(arr[i)):
print(arr[i][j])
a.append([10, 11, 12]) print(a)
a[0].extend([10, 20, 30]) print(a)
a[2].reverse() print(a)
numbers = [1, 2, 3] letters = ["a", "b", "c"] zipped = zip(numbers, letters)
print("list(zip)")
print(list(zipped))
>>> [(1,"a"), (2,"b"), (3,"c")]
print("dict(zip(arr1, arr2))")
print(dict(zip(numbers, letters)))
>>> {1:"a", 2:"b", 3:"c"}
print("set(zip(arr1, arr2))")
print(set(zip(numbers, letters)))
>>> {(1,"a"), (2,"b"), (3,"c")}
print([list(a) for a in zip([1,2,3], [4,5,6], [7,8,9])])
map(function_to_apply, list_of_inputs)
def fix(x):
return x
result = [42, 239, 365, 50]
list(map(fix, result))
>>> [4, 23, 36, 5]
filter(func, iterable)
scores = [66, 90, 68, 59, 76, 65]
def is_A_student(score):
return score > 75
over_75 = list(filter(is_A_student, scores))
>>> [76, 90]
https://www.geeksforgeeks.org/generators-in-python/
product('ABCD', repeat = 2)
>>> AA AB AC AD BA BB BC BD CA CB CC CD DA DB DC DD
permutations('ABCD', 2)
>>> AB AC AD BA BC BD CA CB CD DA DB DC
combinations('ABCD', 2)
>>> AB AC AD BC BD CD
combinations_with_replacement('ABCD', 2)
>>> AA AB AC AD BB BC BD CC CD DD