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check pandas variable type - cools0607 - Jun-12-2020
I am trying to check variable's data type is list or dataframe.
When I got type(df_c) is Out[155]: pandas.core.frame.DataFrame.
Checking it again by type(df_c) == 'pandas.core.frame.DataFrame', it showed False, not True. <-- I think it should print "True" rather than "False".
import pandas as pd c=[1,2,3] df_c=pd.DataFrame(c) type(df_c) Out[155]: pandas.core.frame.DataFrame type(df_c) == 'pandas.core.frame.DataFrame' Out[156]: False
RE: check pandas variable type - buran - Jun-12-2020
you compare type of the object with str object - that's why it's false.
As per the docs and also PEP8 recommendation, the
isinstance() built-in function is recommended for testing the type of an object, because it takes subclasses into account.import pandas as pd spam = [1,2,3] df = pd.DataFrame(spam) # better use isinstance() print(isinstance(df, pd.DataFrame)) print(isinstance(spam, list))
RE: check pandas variable type - cools0607 - Jun-12-2020
Oh! I just got a lesson by isinstance this function.
Thank for your assistance.
(Jun-12-2020, 08:47 AM)buran Wrote: you compare type of the object with str object - that's why it's false.
As per the docs and also PEP8 recommendation, theisinstance()built-in function is recommended for testing the type of an object, because it takes subclasses into account.
import pandas as pd spam = [1,2,3] df = pd.DataFrame(spam) # better use isinstance() print(isinstance(df, pd.DataFrame)) print(isinstance(spam, list))
RE: check pandas variable type - buran - Jun-12-2020
just for brevity, although not recommended using type will work like this
print(type(df_c) == pd.DataFrame)