AttributeError: 'list' object has no attribute 'replace' out = [j.replace("on", "re") for j in out]

Question

我正在尝试用用户词替换这些词。这两个词都取自用户。但是我不知道这是怎么回事。

def practiseeight():
    number = str(request.args.get('num'))
    on = str(request.args.get('one'))
    re = str(request.args.get('two'))
    value = number.split('<')
    print(value)
    out = []
    for i in value:
        i = i.split('>')
        out.append(i)
        print("This is",out)
        
     
    out = [j.replace("on", "re") for j in out]
    print("new list", out)

Answer 1

您的代码中的问题：

out = []
    for i in value:
        i = i.split('>') # so you are splitting i, split return a list
        out.append(i) # you are appending i which is a list
        print("This is",out)
    out = [j.replace("on", "re") for j in out] # now you are going through each element in out, each element is a list. List do not have replace, strings do!

要在列表列表中替换：

out = [['abc'], ['abc', 'bcd']]
for i in out: # go through each element in out
    for j,v in enumerate(i): i[j] = v.replace('b','e') # go through each element in the list of list and replace
print(out)

[['aec'], ['aec', 'ecd']]

Answer 2

正如其他答案正确提到的那样，您的变量 'out' 变成了一个列表列表，因为您将 'i' （这是一个列表）附加到变量 'out' 中。请尝试使用 'out.extend'。

out = []
for i in value:
    i = i.split('>')
    out.extend(i)  ## this will add the element 'i' to the end of the existing list 'out'
    print("This is",out)
    
 
out = [j.replace("on", "re") for j in out]
print("new list", out)

AttributeError: 'list' object has no attribute 'replace' out = [j.replace("on", "re") for j in out]

AttributeError: 'list' object has no attribute 'replace' out = [j.replace("on", "re") for j in out]

python

replace

for-loop

list

attributeerror