Question

好吧，所以我正在研究一个脚本，该脚本通过.txt文件进行解析，并根据在文件中找到的某些字符串提出一些建议。

假设我要通过parameters.txt文件进行解析，该文件如下所示：

ztta/roll_memory = 250000
shm = 5000

现在，我用于执行此操作的代码是：

  a = 'ztta/roll_memory = 250000'
  b = 'shm = 5000'
  with open('parameter.txt', 'r') as myfile:
  data = myfile.read()
  if a in data: 
     print("the value of ztta/roll_memory is correct --> PASS")
  else:
     print("the value of ztta/roll memory is incorrect --> FAIL")
  if b in  data:
     print("the value of shm is correct --> PASS")
  else:
     print("the value of shm is incorrect --> FAIL")

这里的问题是，如果.txt文件中的参数之一的值如下：

ztta/roll_memory = 2500 (**instead of 250000**), the if statement would still be triggered.

谢谢

Answer 1

放置if a in data的另一种方法是：

if 'ztta/roll_memory = 250000' in 'ztta/roll_memory = 250000':

您会看到比较字符串中包含的子字符串a，不管尾随多少零。

另一种放置方式：

if 'ab' in 'abc' # True
if 'ab' in 'abd' # True
if 'hello00' in 'hello00000' # True

顺便说一句，您的代码不可扩展。您应该尝试以ints而不是字符串的形式读取参数。即

good_values = {'ztta/roll_memory': 250000, 'shm': 5000}
params = {}

with open('parameter.txt','r') as myfile:
    for line in myfile:
        line_array = [x.strip() for x in line.split('=')]
        params[line_array[0]] = int(line_array[-1])

for key in params:
    if params[key] == good_values[key]:
        print("the value of {0} is correct --> PASS".format(key))
    else:
        print("the value of {0} is incorrect --> FAIL".format(key))

.txt文件解析时出现问题

1 个答案: