I get an error when trying to access a single element in a pandas dataframe this way test_df["LABEL"][0]. Here is a code snippet on how I am loading the data:
print "reading test set"
test_set = pd.read_csv(data_path+"small_test_products.txt", header=0, delimiter="|")
print "shape of the test set", test_set.shape
test_df = pd.DataFrame(test_set)
lengthOfTestSet = len(test_df["LABEL"])
print test_df["LABEL"][0]
Here is the error I am getting:
File "code.py", line 80, in <module>
print test_df["LABEL"][0]
File "/usr/local/lib/python2.7/dist-packages/pandas/core/series.py", line 521, in __getitem__
result = self.index.get_value(self, key)
File "/usr/local/lib/python2.7/dist-packages/pandas/core/index.py", line 3562, in get_value
loc = self.get_loc(k)
File "/usr/local/lib/python2.7/dist-packages/pandas/core/index.py", line 3619, in get_loc
return super(Float64Index, self).get_loc(key, method=method)
File "/usr/local/lib/python2.7/dist-packages/pandas/core/index.py", line 1572, in get_loc
return self._engine.get_loc(_values_from_object(key))
File "pandas/index.pyx", line 134, in pandas.index.IndexEngine.get_loc (pandas/index.c:3824)
File "pandas/index.pyx", line 154, in pandas.index.IndexEngine.get_loc (pandas/index.c:3704)
File "pandas/hashtable.pyx", line 541, in pandas.hashtable.Float64HashTable.get_item (pandas/hashtable.c:9914)
File "pandas/hashtable.pyx", line 547, in pandas.hashtable.Float64HashTable.get_item (pandas/hashtable.c:9852)
KeyError: 0.0
What am I missing?
Like EdChum said 0 is probably not in your index.
Try: df.iloc[0] or df['label'].iloc[0], which is integer based location.
To reset the index if you are having trouble with that: df.reset_index(drop=True)
Check out panda's indexing doc for more information on it