I am learning python and have a very simple query
Basically what exactly does this code below mean in english
for i in values :
for x in othervalues :
does it mean compare all values in values to all values in othervalues ?
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1Go through `values` using `i` to represent each value. Each time, go through `othervalues` using `x` to represent each othervalue. It doesn't say anything about comparing things. – khelwood Nov 15 '15 at 11:56
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Are you hiding a third line under the second `for` from us? – Dimitris Fasarakis Hilliard Nov 15 '15 at 11:57
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yeah there would be an if as third line but i just wanted to know was there actual any comarison done in the above lines. – johndoe12345 Nov 15 '15 at 12:04
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no, no comparison involved. Those two `for` loops iterate on the given sequences. The `StopIteration` exception is raised when the end of a sequence is reached. – Pynchia Nov 15 '15 at 12:17
1 Answers
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As @khelwood said, it simply iterates on two loops.
It iterates through the values in values, assigning each value to the variable i
Inside such loop it does the same thing, iterating on the values of othervalues and assigning each value to the variable x
You can verify it simply adding a print statement inside the loop, that shows the values of i and x
for i in values :
for x in othervalues :
print('i={}, x={}'.format(i,x))
e.g. with an input of
values = 'abc'
othervalues = [1, 2, 3, 4, 5]
it produces
i=a, x=1
i=a, x=2
i=a, x=3
i=a, x=4
i=a, x=5
i=b, x=1
i=b, x=2
i=b, x=3
i=b, x=4
i=b, x=5
i=c, x=1
i=c, x=2
i=c, x=3
i=c, x=4
i=c, x=5
Please make sure you understand how iteration works in python, reading the official docs and this SO Q&A and more tutorials you can find on the internet.
