TypeError:“str”对象不可调用（Python）

Question

代码：

import urllib2 as u
import os as o
inn = 'dword.txt'
w = open(inn)
z = w.readline()
b = w.readline()
c = w.readline()
x = w.readline()
m = w.readline()
def Dict(Let, Mod):
    global str
    inn = 'dword.txt'
    den = 'definitions.txt'

    print 'reading definitions...'

    dell =open(den, 'w')

    print 'getting source code...'
    f = u.urlopen('http://dictionary.reference.com/browse/' + Let)
    a = f.read(800)

    print 'writing source code to file...'
    f = open("dic1.txt", "w")
    f.write(a)
    f.close()

    j = open('defs.txt', 'w')

    print 'finding definition is source code'
    for line in open("dic1.txt"):
        if '<meta name="description" content=' in line:
           j.write(line)

    j.close()

    te = open('defs.txt', 'r').read().split()
    sto = open('remove.txt', 'r').read().split()

    print 'skimming down the definition...'
    mar = []
    for t in te:
        if t.lower() in sto:
            mar.append('')
        else: 
            mar.append(t)
    print mar
    str = str(mar)
    str = ''.join([ c for c in str if c not in (",", "'", '[', ']', '')])

    defin = open(den, Mod)
    defin.write(str)
    defin.write('                 ')
    defin.close()

    print 'cleaning up...'
    o.system('del dic1.txt')
    o.system('del defs.txt')
Dict(z, 'w')
Dict(b, 'a')
Dict(c, 'a')
Dict(x, 'a')
Dict(m, 'a')
print 'all of the definitions are in definitions.txt'

第一个Dict(z, 'w')起作用，然后第二次出现错误：

Traceback (most recent call last):
  File "C:\Users\test.py", line 64, in <module>
    Dict(b, 'a')
  File "C:\Users\test.py", line 52, in Dict
    str = str(mar)
TypeError: 'str' object is not callable

有人知道为什么吗？

@Greg休吉尔：

我已经试过了，但我错了：

Traceback (most recent call last):
 File "C:\Users\test.py", line 63, in <module>
    Dict(z, 'w')
  File "C:\Users\test.py", line 53, in Dict
   strr = ''.join([ c for c in str if c not in (",", "'", '[', ']', '')])
TypeError: 'type' object is not iterable

Answer 1

在我的例子中，我有一个类，它有一个方法和一个同名的string属性，我试图调用这个方法，但是得到了string属性。

Answer 2

虽然不在代码中，但另一个很难发现的错误是试图格式化字符串时缺少%字符：

"foo %s bar %s coffee"("blah","asdf")

但应该是：

"foo %s bar %s coffee"%("blah","asdf")

丢失的%将导致相同的TypeError: 'str' object is not callable。