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I would like to do things like this with a for in a single line, can i do it or i have to use a filter?
not 0 <= n <= 255 for n in [-1, 256, 23]
# True
0 <= n <= 255 for n in [0, 255, 256]
# False
0 <= n <= 255 for n in [0, 24, 255]
# True
982
You can put a for loop inside an if statement using a technique called a nested control flow. This is the process of putting a control statement inside of another control statement to execute an action.
If you want to combine a for loop with multiple conditions, then you have to use for loop with multiple if statements to check the conditions. If all the conditions are True, then the iterator is returned. Syntax: [iterator for iterator in iterable/range(sequence) if (condition1) if (condition2) .........]
No. The condition is evaluated ONCE when the code reaches the IF statement, and then the whole for loop would be executed without ever checking the condition again.
What you are looking for is all:
all(0 <= n <= 255 for n in [0, 255, 256])
# False
all(0 <= n <= 255 for n in [0, 24, 255])
# True
not all(0 <= n <= 255 for n in [-1, 256, 23])
# True
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