CODEWITHSUNDEEP
pythonstringlistinteger
user2598164
user2598164

Reputation: 35

Floating a double list?

I have been reading this page Convert Python list of strings into floats, where list also contains words

And tried to implement this but I can't for a double list.

I have a double list that looks like this

Positions = [['ace','first', '10','-29'],['best','second','200','-10']]

This is what I get from opening a file. What I would like to do is remove the strings from the 2nd and 3rd index spots in the list so as to get both these positions as integers and not strings. Is there a way that I can open the file to mp remove these strings

or

is there a way that I can remove the strings by applying a method to my double list??

Upvotes: 1

Views: 123

Answers (2)

TerryA
TerryA

Reputation: 60014

What you have is nested loops. It's pretty much the same:

>>> L = [['ace','first', '10','-29'],['best','second','200','-10']]
>>> for i in L:
...     i[3] = int(float(i[3]))
...     i[2] = int(float(i[2]))
...     
... 
>>> print L
[['ace', 'first', 10, -29], ['best', 'second', 200, -10]]

Upvotes: 0

inspectorG4dget
inspectorG4dget

Reputation: 114035

Get a list of lists, where each sublist has the int represented in the last two positions of each sublist in Positions:

[[int(i) for i in L[-2:]] for L in Positions]

Turn the string representations of the integers in Positions into ints:

[[int(i) for i in L if ((i.startswith('-') and all(char.isdigit() for char in i)) or all(char.isdigit() for char in i) else i] for L in Positions]

Upvotes: 2

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