Python 在 for 循环中拆分为多个对(名称 :value) of output

Question

我在 python 中有以下代码:

features = {}
    for string in vector:
        string = 'name1:value1 name2:value2 name3:value3'
        name,value = string.split(":");
        features[self._getFeatureId(name)] = float(value);
    return features

但是当我运行代码时，出现以下错误:

name,value = string.split(":");
ValueError: too many values to unpack

这应该是一个 for 循环，它将它们分成 3 个不同的名称和值对。代码可能有什么问题？

Answer 1

string = "name1:value1 name2:value2 name3:value3"
split_on_colon = string.split(":");  # output = ['name1', 'value1 name2', 'value2 name3', 'value3']
split_on_space = string.split(); # No argument means split on white space; output = ['name1:value1', 'name2:value2', 'name3:value3']
# The split you desire is on space and THEN split each item on colon
desired_split = [s.split(':') for s in string.split()] # output = [['name1', 'value1'], ['name2', 'value2'], ['name3', 'value3']]

此外，错误ValueError:要解压的值太多再清楚不过了。它的字面意思是，您正在尝试解压比迭代器中更少的值。