通过python

Question

我有一个STRING，其中包含以下内容：

tesla = {"number_of_shares":0, "avg_price":200}

我希望将股票数量换成3个例子：

tesla = {"number_of_shares":3, "avg_price":200}

我知道我可以这样做：

string = r'tesla = {"number_of_shares":0, "avg_price":200}'
new_string = string.split(":")[0] + ":3" + "," + string.split(",",1)[1]

但我想要的是这样的：

string = r'tesla = {"number_of_shares":0, "avg_price":200}'
replace_function(string_before_number=r'tesla = {"number_of_shares":}', string)  # replace the number which comes after r'"number_of_shares":' with 3

Answer 1

有比re更好的方法，但你可以重新发布：

tesla = {"number_of_shares":3, "avg_price":200}

输出：

import json

def parse_s(s, k, repl):
    name, d = s.split("=", 1)
    js = json.loads(d)
    js[k] = repl
    return "{} = {}".format(name, str(js))


print(parse_s(string, "number_of_shares", "3"))

或者使用json并使用密钥：

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