Coverage for pyquickhelper/pandashelper/tblfunction.py: 100%

1""" 

2@file 

3@brief Various function to deal with pandas tables 

4""" 

5 

6 

7def isempty(s): 

8 """ 

9 checks that a string is empty, returns also True if s is ``NaN`` 

10 

11 @param s ``str`` or ``numpy.NaN`` 

12 @return boolean 

13 

14 The function imports :epkg:`numpy` (delayed import). 

15 """ 

16 if s is None: 

17 return True 

18 if isinstance(s, str): 

19 return len(s) == 0 

20 

21 import numpy 

22 if numpy.isnan(s): 

23 return True 

24 return False # pragma: no cover 

25 

26 

27def isnan(s): 

28 """ 

29 calls :epkg:`numpy:isnan` but checks it is a float first 

30 

31 @param s object 

32 @return boolean 

33 

34 @raise TypeError if ``s`` is not a ``float`` 

35 

36 The function imports :epkg:`numpy` (delayed import). 

37 """ 

38 if isinstance(s, float): 

39 import numpy 

40 return numpy.isnan(s) 

41 raise TypeError( # pragma: no cover 

42 f"wrong type before calling numpy.isnan: {type(s)}")