python pandas DataFrame无法获取第一列数据
python pandas DataFrame无法获取第一列数据
提问于 2018-06-27 08:31:38
我正在使用Pandas做数据处理，遇到一个问题，它不能获取第一列数据，但可以获取其他列数据，为什么？我该如何解决这个问题，有人能帮上忙吗？
我刚刚导入了excel文件的数据，并希望通过以下方式获取名称数据(第一列
data['Name']
错误如下所示
KeyError Traceback (most recent call last)
/Users/test/anaconda/lib/python3.6/site-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
2392 try:
-> 2393 return self._engine.get_loc(key)
2394 except KeyError:
pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc (pandas/_libs/index.c:5239)()
pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc (pandas/_libs/index.c:5085)()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item (pandas/_libs/hashtable.c:20405)()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item (pandas/_libs/hashtable.c:20359)()
KeyError: 'Name'
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
<ipython-input-67-47e6fa66308a> in <module>()
----> 1 school_names = processing['Name']
/Users/test/anaconda/lib/python3.6/site-packages/pandas/core/frame.py in __getitem__(self, key)
2060 return self._getitem_multilevel(key)
2061 else:
-> 2062 return self._getitem_column(key)
2063
2064 def _getitem_column(self, key):
/Users/test/anaconda/lib/python3.6/site-packages/pandas/core/frame.py in _getitem_column(self, key)
2067 # get column
2068 if self.columns.is_unique:
-> 2069 return self._get_item_cache(key)
2070
2071 # duplicate columns & possible reduce dimensionality
/Users/test/anaconda/lib/python3.6/site-packages/pandas/core/generic.py in _get_item_cache(self, item)
1532 res = cache.get(item)
1533 if res is None:
-> 1534 values = self._data.get(item)
1535 res = self._box_item_values(item, values)
1536 cache[item] = res
/Users/test/anaconda/lib/python3.6/site-packages/pandas/core/internals.py in get(self, item, fastpath)
3588
3589 if not isnull(item):
-> 3590 loc = self.items.get_loc(item)
3591 else:
3592 indexer = np.arange(len(self.items))[isnull(self.items)]
/Users/test/anaconda/lib/python3.6/site-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
2393 return self._engine.get_loc(key)
2394 except KeyError:
-> 2395 return self._engine.get_loc(self._maybe_cast_indexer(key))
2396
2397 indexer = self.get_indexer([key], method=method, tolerance=tolerance)
pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc (pandas/_libs/index.c:5239)()
pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc (pandas/_libs/index.c:5085)()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item (pandas/_libs/hashtable.c:20405)()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item (pandas/_libs/hashtable.c:20359)()
KeyError: 'Name'回答 2
Stack Overflow用户
回答已采纳
发布于 2018-06-27 08:48:15
检查processing.columns并检查'Name'是否真的在其中。格外注意可能出现的空格。
Stack Overflow用户
发布于 2018-06-27 08:52:37
最后一行应该引用名为"data“的数据帧。
school_names = data['Name']页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/51053004
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