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Pythonで変数を動的に定義する方法

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概要

  • Pythonで変数を動的に定義する方法を紹介
  • execで動的に変数を定義する
    • ただし、日本語等マルチバイト文字はエラーがでるため少し工夫した。

用途

  • ユーザーが好き勝手名称を定義するので、何とかしたかった。

ソースコード


# ユーザーの適当Input
header_list = ['ほげほげ', 'ふがふが', 'ほげふが']
vars = [25.7,13.2,12.5]

coef_list = []
for no,(header,var) in enumerate(zip(header_list,vars)):
    coef_list.append(dict(name = 'coef'+str(no),header=header,var=var))

# output
# サンプル係数辞書(dict型)
print(coef_list)

>> [{'name': 'coef0', 'header': 'ほげほげ', 'var': 25.7},
    {'name': 'coef1', 'header': 'ふがふが', 'var': 13.2},
    {'name': 'coef2', 'header': 'ほげふが', 'var': 12.5}]
# dict型からnameとvarを取り出して、変数として定義する。
for coef in coef_list:
    exec('{name} = {var}'.format(name = coef['name'], var = coef['var']))

print(coef0)
print(coef1)
print(coef2)

# output
>> 25.7
>> 13.2
>> 12.5
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