質問編集履歴
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all codes below
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```Python
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import pandas as pd
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import numpy as np
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import scipy as sp
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import matplotlib.pyplot as plt
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import matplotlib as mpl
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import datetime as dt
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import seaborn as sns
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import io
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from dateutil.parser import parse
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%precision 3
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data = pd.read_csv(rf'G:\共有.csv', engine='python',
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encoding='cp932', dtype='object')
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df = pd.read_csv(rf'G:\購買履歴', engine='python',
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encoding='cp932', dtype='object')
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#取り込んだデータの確認
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data.info()
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df.keys()
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df.head()
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data.drop_duplicates() #重複の削除
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#chnage values into strings
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data['cst'].astype(str)
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data['Store'].astype(str)
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data['Post'].astype(str)
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data = data.drop(['date_n', 'birthday_n'], axis = 1)
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#カラムをdatetime型に変換
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df =pd.to_datetime(df['date_c'])
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s = df.loc(['yymm_purchase'])
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df = pd.to_datetime(s)
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```
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changed the question
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test
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皆様もこういった経験はあるのでしょうか？
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これは環境の問題ですか？？？
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解決方法が分かる方はいらっしゃいますでしょうか？？？
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added an example
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皆様もこういった経験はあるのでしょうか？
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これは環境の問題ですか？？？
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例えば、
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```Python
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df.keys()
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```
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Index(['cst_id', 'date_purchase_c', 'date_purchase_n',** 'yymm_purchase',**
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'InsDate', 'dhms_InsDate', 'Trn_Type', 'rev', 'num', 'code', 'Brand',
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'MdName', 'TranKey', 'TranLineNo', 'Store_code', 'TerminalNo',
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'date_purchase', 'TranNo', 'StoreName', 'St_SalesChannel',
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'St_Hierarchy', 'Category_c', 'Item_c', 'Sub_Item_c', 'Category',
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'Item', 'Sub_Item', 'Sub_Item_2', 'FY'],
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dtype='object')
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なのに、
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```Python
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df =pd.to_datetime(df['yymm_purchase'])
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```
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###エラーメッセージ
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---------------------------------------------------------------------------
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KeyError Traceback (most recent call last)
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<ipython-input-56-7d6126cfd80c> in <module>
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----> 1 df =pd.to_datetime(df['yymm_purchase'])
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~\AppData\Local\Continuum\anaconda3\lib\site-packages\pandas\core\series.py in __getitem__(self, key)
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866 key = com.apply_if_callable(key, self)
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867 try:
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--> 868 result = self.index.get_value(self, key)
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869
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870 if not is_scalar(result):
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~\AppData\Local\Continuum\anaconda3\lib\site-packages\pandas\core\indexes\base.py in get_value(self, series, key)
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4373 try:
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4374 return self._engine.get_value(s, k,
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-> 4375 tz=getattr(series.dtype, 'tz', None))
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4376 except KeyError as e1:
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4377 if len(self) > 0 and (self.holds_integer() or self.is_boolean()):
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pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_value()
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pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_value()
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pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()
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pandas/_libs/index_class_helper.pxi in pandas._libs.index.Int64Engine._check_type()
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KeyError: 'yymm_purchase'
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意味不明すぎて泣きそうです。。。
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助けて下さい。。。
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