I think this easy-to-make mistake should raise a more descriptive error... maybe something like
ValueError: Did you mean to supply a 'sep' keyword?
I might be missing the main usage of str.cat(), but all the uses I've found involve concatenating series together with a sep character.
In [1]: import pandas as pd
In [2]: s = pd.Series(['foo', 'bar', 'baz'])
In [3]: s.str.cat('|')
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-3-8bc5f2a1347b> in <module>()
----> 1 s.str.cat('|')
/home/charles.hack/anaconda/envs/seahydra/lib/python2.7/site-packages/pandas/core/strings.pyc in cat(self, others, sep, na_rep)
1137 @copy(str_cat)
1138 def cat(self, others=None, sep=None, na_rep=None):
-> 1139 result = str_cat(self.series, others=others, sep=sep, na_rep=na_rep)
1140 return self._wrap_result(result)
1141
/home/charles.hack/anaconda/envs/seahydra/lib/python2.7/site-packages/pandas/core/strings.pyc in str_cat(arr, others, sep, na_rep)
71 arrays = _get_array_list(arr, others)
72
---> 73 n = _length_check(arrays)
74 masks = np.array([isnull(x) for x in arrays])
75 cats = None
/home/charles.hack/anaconda/envs/seahydra/lib/python2.7/site-packages/pandas/core/strings.pyc in _length_check(others)
111 if n is None:
112 n = len(x)
--> 113 elif len(x) != n:
114 raise ValueError('All arrays must be same length')
115
TypeError: len() of unsized object
In [4]: s.str.cat(sep='|')
Out[4]: 'foo|bar|baz'
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4