Python 如何获取数字=[“12”、“145”、“45”、“12.4”、“45,14”、“15 645”等]数字

你的问题很模糊。但我会为你试一试

ValueError: could not convert string to float: '45,14'

假设您只希望列表是数字，但仍然是字符串

["12", "145", "45", "12.4", "45,14", "15 645"]

输出

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [dgt.replace(",","").replace(".","").replace(" ","") for dgt in digits]
print(new_digits)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [int(dgt.replace(",","").replace(".","").replace(" ","")) for dgt in digits]
print(new_digits)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
out_str = "" 

for number in digits:
    for single_number in number:
        if not single_number in [",","."," "]:
            out_str += single_number
print(out_str)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [float(dgt.replace(",",".").replace(" ",".")) for dgt in digits]
print(new_digits)

如果要将它们作为整数，请使用int（）将其包装

输出

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [dgt.replace(",","").replace(".","").replace(" ","") for dgt in digits]
print(new_digits)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [int(dgt.replace(",","").replace(".","").replace(" ","")) for dgt in digits]
print(new_digits)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
out_str = "" 

for number in digits:
    for single_number in number:
        if not single_number in [",","."," "]:
            out_str += single_number
print(out_str)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [float(dgt.replace(",",".").replace(" ",".")) for dgt in digits]
print(new_digits)

如果您希望将它们全部放在一个字符串中，那么可以执行以下操作

[12, 145, 45, 124, 4514, 15645]

输出

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [dgt.replace(",","").replace(".","").replace(" ","") for dgt in digits]
print(new_digits)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [int(dgt.replace(",","").replace(".","").replace(" ","")) for dgt in digits]
print(new_digits)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
out_str = "" 

for number in digits:
    for single_number in number:
        if not single_number in [",","."," "]:
            out_str += single_number
print(out_str)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [float(dgt.replace(",",".").replace(" ",".")) for dgt in digits]
print(new_digits)

或者，如果您想返回每个的浮动，那么

1214545124451415645

输出

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [dgt.replace(",","").replace(".","").replace(" ","") for dgt in digits]
print(new_digits)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [int(dgt.replace(",","").replace(".","").replace(" ","")) for dgt in digits]
print(new_digits)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
out_str = "" 

for number in digits:
    for single_number in number:
        if not single_number in [",","."," "]:
            out_str += single_number
print(out_str)

digits = ["12", "145", "45", "12.4", "45,14", "15 645"]
new_digits = [float(dgt.replace(",",".").replace(" ",".")) for dgt in digits]
print(new_digits)

---

i.replace

不更新变量

i

，它返回一个新值。