check if variable is dataframe

Question

when my function f is called with a variable I want to check if var is a pandas dataframe   def f var       if var    pd DataFrame            print  do stuff    I guess the solution might be quite simple but even with   def f var       if var values    None          print  do stuff    I can t get it to work like expected

User · Answer

Use the built-in isinstance   function   import pandas as pd  def f var       if isinstance var  pd DataFrame           print  do stuff

User · Answer

Use isinstance  nothing else   if isinstance x  pd DataFrame             do something     PEP8 says explicitly that isinstance is the preferred way to check types  No   type x  is pd DataFrame No   type x     pd DataFrame Yes  isinstance x  pd DataFrame    And don t even think about  if obj   class     name      DataFrame       expect problems some day     isinstance handles inheritance  see What are the differences between type   and isinstance      For example  it will tell you if a variable is a string  either str or unicode   because they derive from basestring   if isinstance obj  basestring       i am string obj    Specifically for pandas DataFrame objects   import pandas as pd isinstance var  pd DataFrame

[python] check if variable is dataframe

Examples related to python

Examples related to pandas