python-2.7 - 我的 Python 代码中的 AttributeError

Question

我对python相当陌生。我正在解析一个大文件，我想检查不同的输入是否正确，特别是如果输入的 ID 在文件头中。当我运行以下代码时，我收到此错误消息：

AttributeError：“str”对象没有属性“readlines”

---

filename = str(raw_input('enter filename: '))

try:
    with open(filename, 'rU'): pass
except IOError:
    print 'The file does not exist'
    sys.exit(0)

def findID(w):
    return re.compile(r'\b({0})\b'.format(w), flags=re.IGNORECASE).search

while True:
    ID = (raw_input("Enter ID: ")).upper()
    IDheader = ID + ".NA"
    with open(filename, 'rU') as f: 
        first_line = f.readline()
    if findID(IDheader)(first_line):
        print "you entered ",ID
        break
    else:
        pass
        print "ID not in this file."`


for line in filename.readlines():
    Line = line.split() 

    if...

---

谢谢

Answer 1

filename是文件名，而不是文件句柄。你需要打开它：

with open(filename, 'r') as handle:
    for line in handle:
        line = line.split()