python how to judge whether a variable is boolean type

Question

In python, how to judge whether a variable is bool type,python 3.6 using

    for i in range(len(data)):
        for k in data[i].keys():
            if type(data[i][k]) is types.BooleanType:
                data[i][k] = str(data[i][k])
            row.append(data[i][k])
            #row.append(str(data[i][k]).encode('utf-8'))
        writer.writerow(row)
        row = []

but it errors:

  if type(data[i][k]) is types.BooleanType:

  TypeError: 'str' object is not callable

>>> a=False >>> isinstance(a, bool) True >>> isinstance(a, str) False — CSJ
– CSJ, Commented Jan 12, 2017 at 9:49
Possible duplicate of How to compare type of an object in Python? — Saurav Sahu
– Saurav Sahu, Commented Jan 12, 2017 at 10:00

RichSmith · Accepted Answer · 2017-01-12 09:51:26Z

32

you can check type properly with isinstance()

isinstance(data[i][k], bool)

will return true if data[i][k] is a bool

answered Jan 12, 2017 at 9:51

RichSmith

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Taufiq Rahman · Accepted Answer · 2017-01-12 09:55:58Z

3

 isinstance(data[i][k], bool) #returns True if boolean

instead of :

if type(data[i][k]) is types.BooleanType:

answered Jan 12, 2017 at 9:55

Taufiq Rahman

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