回答編集履歴
2
修正
test
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@@ -18,7 +18,7 @@
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df1
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df1 = pd.DataFrame(
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[
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@@ -38,7 +38,7 @@
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df
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df2 = pd.DataFrame(
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[[3320, "電気"], [6701, "石油"], [4536, "通信"], [7777,]], columns=["番号", "業種"]
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@@ -46,7 +46,9 @@
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merged = pd.merge(df1
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merged = pd.merge(df1, df2, on="番号", suffixes=("", "_y"))
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merged["業種"].update(merged["業種_y"])
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test
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@@ -1,4 +1,4 @@
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列名が重複した場合、左側の列を残すとして
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列名が重複した場合、左側の DataFrame の列を残すとして
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@@ -57,3 +57,17 @@
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print(merged)
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```
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> suffixeslist-like, default is (“_x”, “_y”)
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A length-2 sequence where each element is optionally a string indicating the suffix to add to overlapping column names in left and right respectively. Pass a value of None instead of a string to indicate that the column name from left or right should be left as-is, with no suffix. At least one of the values must not be None.
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* [pandas.DataFrame.merge — pandas 1.1.4 documentation](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.merge.html)
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* [pandas - DataFrame を結合する pandas.merge の使い方 ](https://pystyle.info/pandas-merge/#outline__2_4)
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