Python脚本设置Asterisk变量时的空值转整数错误排查

我正在编写Python脚本，读取文件中的行并拆分，将手机号设置为Asterisk拨号计划的变量。文件行格式如下：

Doe,John,Adam,123456789

运行时出现错误：

Error converting phone_number to integer: invalid literal for int() with base 10: ''

虽然打印变量能显示正确手机号（如phone: 123456789），但报错仍存在。移除整数转换操作后，仍出现类似错误，以下是多版代码及对应报错信息，请求排查问题根源。

初始代码及报错 #

with open(file_path, 'r') as file:
    i = 0  
    for line in file:
        
        parts = line.strip().split(',')

        # Ensure that there are enough parts in the line
        if len(parts) >= 4:
            surname, name, lastname, phone_number = parts[:4]

            # Check if phone_number is not empty before conversion
            if phone_number.strip():  # Check if the stripped value is not empty
                try:
                    phone_number = int(phone_number)
                    agi.set_variable('PHONE_NUMBER', f"{phone_number}")
                except ValueError as e:
                    print(f"Error converting phone_number to integer: {e}")
                except Exception as e:
                    print(f"Error setting PHONE_NUMBER: {e}")
            else:
                print(f"Empty phone_number encountered on line {i + 1}, skipping...")
        else:
            print(f"Invalid line format on line {i + 1}: {line.strip()}")

        print(f"phone: {phone_number}")

报错信息：

Error converting phone_number to integer: invalid literal for int() with base 10: ''

Update1：移除整数转换后的代码及报错 #

更新后代码：

with open(file_path, 'r') as file:
    for line in file:
        parts = line.strip().split(',')

        # Ensure that there are enough parts in the line
        if len(parts) >= 4:
            surname, name, lastname, phone_number = parts[:4]

            # Check if phone_number is not empty before conversion
            if phone_number.strip():  # Check if the stripped value is not empty
                try:
                    agi.set_variable('PHONE_NUMBER', phone_number.strip())
                except Exception as e:
                    print(f"Error setting PHONE_NUMBER: {e}")
            else:
                print(f"Empty phone_number encountered on line {i + 1}, skipping...")
        else:
            print(f"Invalid line format on line {i + 1}: {line.strip()}")

        print(f"name: {phone_number}")

报错信息：

COMMAND: SET VARIABLE "PHONE_NUMBER" "123456789"
    SET VARIABLE "PHONE_NUMBER" "123456789"
    
        RESULT_LINE:
    Error setting PHONE_NUMBER: invalid literal for int() with base 10: 
''
phone: 123456789

Update2：修改空值判断后的代码及报错 #

对应代码片段：

# Check if phone_number is not empty before conversion
            if len(phone_number) > 0:  # Check if the stripped value is not empty
                try:
                    agi.set_variable('PHONE_NUMBER', phone_number.strip())
                except Exception as e:
                    print(f"Error setting PHONE_NUMBER: {e}")
            else:
                print(f"Empty phone_number encountered on line {i + 1}, skipping...")
        else:
            print(f"Invalid line format on line {i + 1}: {line.strip()}")

报错信息：

COMMAND: SET VARIABLE "PHONE_NUMBER" "123456789"
SET VARIABLE "PHONE_NUMBER" "123456789"

    RESULT_LINE:
Error setting PHONE_NUMBER: invalid literal for int() with base 10: ''
name: 123456789

内容的提问来源于stack exchange，提问作者Norbert Yuhas