LinuxQuestions.org - Python variable type

- Programming (https://www.linuxquestions.org/questions/programming-9/)

- - Python variable type (https://www.linuxquestions.org/questions/programming-9/python-variable-type-773991/)

MTK358

12-07-2009 09:09 AM

Python variable type

I wonder how to know if a variable in Python is a number, list, or string?

Hko	12-07-2009 10:07 AM

Code:

>>> a = [5]

>>> b = "5"

>>> c = 5



>>> type(a)

<type 'list'>



>>> type(b)

<type 'str'>



>>> type(c)

<type 'int'>



>>> if isinstance(a, list): print "Yes, it is a list!"

... 

Yes, it is a list!

MTK358

12-07-2009 10:10 AM

I thought that Python doesn't tell any difference between int and float!?

Also, I wonder how to split a string into a list of words, and how to check if a variable does not equal any one of the contents of a list?

David1357

12-07-2009 11:02 AM

Quote:

Originally Posted by MTK358 (Post 3782840)

I thought that Python doesn't tell any difference between int and float!?

Python would disagree with you:

Code:

C:\>python

Python 2.6.2 (r262:71605, Apr 14 2009, 22:40:02) [MSC v.1500 32 bit (Intel)] on win32

Type "help", "copyright", "credits" or "license" for more information.

>>> 5 / 6

0

>>> 5.0 / 6.0

0.83333333333333337

>>>

bgeddy

12-07-2009 02:49 PM

Quote:

Also, I wonder how to split a string into a list of words, and how to check if a variable does not equal any one of the contents of a list?

Code:

mylist="This is a string to split".split()

is_in_list="unique" in mylist

print "unique is in mylist=",mylist,is_in_list

ghostdog74

12-07-2009 05:53 PM

and finally, head down to the Python documentation site, (my sig) to learn all about it.

Hko	12-08-2009 04:11 AM

Quote:

Originally Posted by MTK358 (Post 3782840)

Also, I wonder how to split a string into a list of words, and how to check if a variable does not equal any one of the contents of a list?

When you were looking for how to split a string, I wonder how did you manage not to find the "split" method of a string in the docs?

Code:

>>> someString = "aap noot mies wim zus jet teun"

>>> someList = someString.split()

>>> type(someList)

<type 'list'>

>>> someList

['aap', 'noot', 'mies', 'wim', 'zus', 'jet', 'teun']

>>> if "zus" in someList: print "Yes, it is in the list!"

... 

Yes, it is in the list!

All times are GMT -5. The time now is 08:08 PM.