Python 錯誤：TypeError：'int' 對象不可調用

Question

打開文件 mbox-short.txt 並逐行讀取。 當您找到以“From”開頭的行時，如下所示：

From stephen.marquard@uct.ac.za Sat Jan  5 09:14:16 2008

您將使用 split() 解析 From 行並打印出該行中的第二個單詞（即發送消息的人的完整地址）。 然后在最后打印出一個計數。

提示：確保不要包含以“From:”開頭的行。

mbox-short.txt 文件的鏈接： http ://www.pythonlearn.com/code/mbox-short.txt

fopen = raw_input('Enter the file name you want to open: ')
fname = open(fopen)
line = 0
count = 0
pieces = 0
email = list()
for line in fname:
    lines = line.rstrip()
    if not line.startswith('From '):
        continue
    pieces = line.split()
    print pieces[1]
print 'There were' ,count(pieces[1]), 'lines in the file with From as the first word

我設法獲得了正確的輸出，直到最后一個打印消息。

執行：

Enter the file name you want to open: mbox-short.txt

louis@media.berkeley.edu
zqian@umich.edu
rjlowe@iupui.edu
zqian@umich.edu
rjlowe@iupui.edu
cwen@iupui.edu
cwen@iupui.edu
gsilver@umich.edu
gsilver@umich.edu
zqian@umich.edu
gsilver@umich.edu
wagnermr@iupui.edu
zqian@umich.edu
antranig@caret.cam.ac.uk
gopal.ramasammycook@gmail.com
david.horwitz@uct.ac.za
david.horwitz@uct.ac.za
david.horwitz@uct.ac.za
david.horwitz@uct.ac.za
stephen.marquard@uct.ac.za
louis@media.berkeley.edu
louis@media.berkeley.edu
ray@media.berkeley.edu
cwen@iupui.edu
cwen@iupui.edu
cwen@iupui.edu

Traceback (most recent call last):
print 'There were' ,count(pieces[1]), 'lines in the file with From as   the first word'

TypeError: 'int' object is not callable

我不確定為什么我會得到這個 Traceback。

Answer 1

'int' object is not callable因為count = 0然后count(pieces[1]) 。 你有一個整數，你正在調用它。 在這之后：

pieces = line.split()
print pieces[1]

添加這個：

count += 1

然后改變這個：

print 'There were' ,count(pieces[1]),

對此：

print 'There were', count,

Answer 2

正如問題中的評論所提到的， count沒有列為函數 - 相反，它是一個int 。 您不能將pieces[1]傳遞給它並期望它神奇地自增。

如果您真的希望以這種方式計數，只需在循環遍歷文件時更新計數即可。

fopen = raw_input('Enter the file name you want to open: ')
fname = open(fopen)
line = 0 # unnecessary
count = 0 
pieces = 0 # also unnecessary
email = list() # also unnecessary
for line in fname:
    lines = line.rstrip()
    if not line.startswith('From '):
        continue
    pieces = line.split()
    print pieces[1]
    count = count + 1 # increment here - counts number of lines in file
print 'There were', count, 'lines in the file with From as the first word