如何修复此错误：“NameError：未定义全局名称'filtered_text'”;在下面的代码？

Question

numberOfSectionsInTableView

Answer 1

在函数dict_count中，您从未创建过filtered_text变量，然后您想要使用它。

您必须先创建变量，然后才能使用：

filtered_text = filter_file(files)

完整代码：

def dict_count(files):
    """ for loop to return dict with word count and length keys """
    lengths = {}
    filtered_text = filter_file(files)
    for word in filtered_text:  # And this also
        length = len(word)
        if length not in lengths:
            lengths[length] = 0
        lengths[length] += 1
    for length, counter in lengths.item():
        return "Words of length %d: %d" % (length, counter)