/Python/Python list comprehension double for

Python list comprehension double for

[x for y in collection for x in y] # [A for B in C for D in E]

Python list comprehension double for

>>> l = [(x,y) for x in range(0,3) for y in range(5, 8)]
>>> l
[(0, 5), (0, 6), (0, 7), (1, 5), (1, 6), (1, 7), (2, 5), (2, 6), (2, 7)]

# they can also be "chained"
>>> l = [(x,y) for x in range(0,4) for y in range(0, x)]
>>> l
[(1, 0), (2, 0), (2, 1), (3, 0), (3, 1), (3, 2)]

Similar codes

10 votes172 views6 answers
Declaring variables in python
Python
0 vote176 views1 answer
Python one line key increment or add
Python
0 vote195 views2 answers
Django edit object foreign key id
Python Django
2 votes176 views2 answers
Install wxPython
Python
8 votes182 views6 answers
Remove outliers python pandas
Python
0 vote223 views2 answers
Sqlalchemy function for default value for column
Python
2 votes191 views2 answers
Random dice python
Python
7 votes169 views2 answers
Python list 1 to n
Python
0 vote182 views1 answer
Jhoom.In
Python
0 vote179 views1 answer
Execute command from url.script
Python