質問編集履歴
1
エラーメッセージの追記
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@@ -5,7 +5,7 @@
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エクセル自体のデータ例：198604
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これを1986－04
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のように変換したいです
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-
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df['年月'] = pd.to_datetime(df['年月'], format = '%Y%m')
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df['年月']
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@@ -23,4 +23,54 @@
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のようになってしまいます。
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解決策を教えてほしいです。
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（エクセルデータの前処理が必要なのでしょうか？あるいはpandasで数字列をうまく処理できるのでしょうか？？）
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（エクセルデータの前処理が必要なのでしょうか？あるいはpandasで数字列をうまく処理できるのでしょうか？？）
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+
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### 発生している問題・エラーメッセージ
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TypeError Traceback (most recent call last)
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~\anaconda3\lib\site-packages\pandas\core\tools\datetimes.py in _convert_listlike_datetimes(arg, format, name, tz, unit, errors, infer_datetime_format, dayfirst, yearfirst, exact)
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449 try:
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--> 450 values, tz = conversion.datetime_to_datetime64(arg)
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451 dta = DatetimeArray(values, dtype=tz_to_dtype(tz))
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pandas\_libs\tslibs\conversion.pyx in pandas._libs.tslibs.conversion.datetime_to_datetime64()
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TypeError: Unrecognized value type: <class 'str'>
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During handling of the above exception, another exception occurred:
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ValueError Traceback (most recent call last)
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<ipython-input-7-41d172471441> in <module>
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----> 1 df['年月'] = pd.to_datetime(df['年月'].astype(str), format = '%Y%m')
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2 df['年月']
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~\anaconda3\lib\site-packages\pandas\core\tools\datetimes.py in to_datetime(arg, errors, dayfirst, yearfirst, utc, format, exact, unit, infer_datetime_format, origin, cache)
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797 result = result.tz_localize(tz)
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798 elif isinstance(arg, ABCSeries):
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--> 799 cache_array = _maybe_cache(arg, format, cache, convert_listlike)
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800 if not cache_array.empty:
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801 result = arg.map(cache_array)
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~\anaconda3\lib\site-packages\pandas\core\tools\datetimes.py in _maybe_cache(arg, format, cache, convert_listlike)
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168 unique_dates = unique(arg)
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169 if len(unique_dates) < len(arg):
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--> 170 cache_dates = convert_listlike(unique_dates, format)
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171 cache_array = Series(cache_dates, index=unique_dates)
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172 return cache_array
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~\anaconda3\lib\site-packages\pandas\core\tools\datetimes.py in _convert_listlike_datetimes(arg, format, name, tz, unit, errors, infer_datetime_format, dayfirst, yearfirst, exact)
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452 return DatetimeIndex._simple_new(dta, name=name)
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453 except (ValueError, TypeError):
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--> 454 raise e
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455
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456 if result is None:
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~\anaconda3\lib\site-packages\pandas\core\tools\datetimes.py in _convert_listlike_datetimes(arg, format, name, tz, unit, errors, infer_datetime_format, dayfirst, yearfirst, exact)
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415 if result is None:
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416 try:
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--> 417 result, timezones = array_strptime(
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418 arg, format, exact=exact, errors=errors
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419 )
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pandas\_libs\tslibs\strptime.pyx in pandas._libs.tslibs.strptime.array_strptime()
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ValueError: unconverted data remains: .0
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