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With python, I would like to run a test over an entire list, and, if all the statements are true for each item in the list, take a certain action.
Pseudo-code: If "test involving x" is true for every x in "list", then do "this".
It seems like there should be a simple way to do this.
What syntax should I use in python?
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For Loop in Python For loops are used for sequential traversal. For example: traversing a list or string or array etc. In Python, there is no C style for loop, i.e., for (i=0; i<n; i++).
Example. #!/usr/bin/python3 for letter in 'Python': # traversal of a string sequence print ('Current Letter :', letter) print() fruits = ['banana', 'apple', 'mango'] for fruit in fruits: # traversal of List sequence print ('Current fruit :', fruit) print ("Good bye!")
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. You can put an if statements inside for loops.
Use all(). It takes an iterable as an argument and return True if all entries evaluate to True. Example:
if all((3, True, "abc")):
print "Yes!"
You will probably need some kind of generator expression, like
if all(x > 3 for x in lst):
do_stuff()
>>> x = [True, False, True, False]
>>> all(x)
False
all() returns True if all the elements in the list are True
Similarly, any() will return True if any element is true.
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