zxn=int(len(train_size)) ^^^^^^^^^^^^^^^ TypeError: object of type 'int' has no len()怎么修改

你遇到的错误是因为你尝试对一个整数类型的对象使用len()函数，而整数类型没有len()方法。len()函数通常用于计算可迭代对象的长度，例如列表或字符串。

如果你想获得train_size的长度，你可以将其转换为字符串类型，然后再使用len()函数。修改代码如下：

zxn = len(str(train_size))

这样，train_size将首先被转换为字符串类型，然后你可以使用len()函数获取其长度。

相关问题

使用Java方法取出{access_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsiV0VCUyJdLCJ1c2VyX2lkIjoiMTY0MzgxNjExMTczMDU2MTAyNiIsInVzZXJfbmFtZSI6InF5dGVzdCIsInNjb3BlIjpbInJlYWQiXSwiZXhwIjoxNzE2MTA3NTU5LCJhdXRob3JpdGllcyI6WyJjdiJdLCJqdGkiOiJiZGE2MmY3OS1lMWM4LTQyYjEtODJlYi0zNWI1OGQ1YTA4OWEiLCJjbGllbnRfaWQiOiJ0ZXN0X2NsaWVudCJ9.19Vf7XxjwlroLWBFuQh0mqeLHnAbQti8Q0c9EveFPyo, token_type=bearer, refresh_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsiV0VCUyJdLCJ1c2VyX2lkIjoiMTY0MzgxNjExMTczMDU2MTAyNiIsInVzZXJfbmFtZSI6InF5dGVzdCIsInNjb3BlIjpbInJlYWQiXSwiYXRpIjoiYmRhNjJmNzktZTFjOC00MmIxLTgyZWItMzViNThkNWEwODlhIiwiZXhwIjoxNjg1MTExNTU5LCJhdXRob3JpdGllcyI6WyJjdiJdLCJqdGkiOiJmMGQ0NzdlYi05ZGI5LTQ1YTEtYjUyMy01YTljYjY0NzY2ZDUiLCJjbGllbnRfaWQiOiJ0ZXN0X2NsaWVudCJ9.VwOsvGGCb7SWGeIC_X8e7FQyjfbk5LXbgJMHj16ax1c, expires_in=31103999, scope=read, user_id=1643816111730561026, jti=bda62f79-e1c8-42b1-82eb-35b58d5a089a}中access_token

可以使用如下的Java方法来取出access_token：

public String getAccessToken(String tokenString) {
    String accessToken = "";
    if (tokenString != null && !tokenString.isEmpty()) {
        String[] tokens = tokenString.split(",");
        for (String token : tokens) {
            if (token.contains("access_token=")) {
                accessToken = token.split("=")[1];
                break;
            }
        }
    }
    return accessToken;
}

调用方法如下：

String tokenString = "{access_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsiV0VCUyJdLCJ1c2VyX2lkIjoiMTY0MzgxNjExMTczMDU2MTAyNiIsInVzZXJfbmFtZSI6InF5dGVzdCIsInNjb3BlIjpbInJlYWQiXSwiZXhwIjoxNzE2MTA3NTU5LCJhdXRob3JpdGllcyI6WyJjdiJdLCJqdGkiOiJiZGE2MmY3OS1lMWM4LTQyYjEtODJlYi0zNWI1OGQ1YTA4OWEiLCJjbGllbnRfaWQiOiJ0ZXN0X2NsaWVudCJ9.19Vf7XxjwlroLWBFuQh0mqeLHnAbQti8Q0c9EveFPyo, token_type=bearer, refresh_token=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsiV0VCUyJdLCJ1c2VyX2lkIjoiMTY0MzgxNjExMTczMDU2MTAyNiIsInVzZXJfbmFtZSI6InF5dGVzdCIsInNjb3BlIjpbInJlYWQiXSwiYXRpIjoiYmRhNjJmNzktZTFjOC00MmIxLTgyZWItMzViNThkNWEwODlhIiwiZXhwIjoxNjg1MTExNTU5LCJhdXRob3JpdGllcyI6WyJjdiJdLCJqdGkiOiJmMGQ0NzdlYi05ZGI5LTQ1YTEtYjUyMy01YTljYjY0NzY2ZDUiLCJjbGllbnRfaWQiOiJ0ZXN0X2NsaWVudCJ9.VwOsvGGCb7SWGeIC_X8e7FQyjfbk5LXbgJMHj16ax1c, expires_in=31103999, scope=read, user_id=1643816111730561026, jti=bda62f79-e1c8-42b1-82eb-35b58d5a089a}";
String accessToken = getAccessToken(tokenString);
System.out.println(accessToken);

这个方法会输出：

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOlsiV0VCUyJdLCJ1c2VyX2lkIjoiMTY0MzgxNjExMTczMDU2MTAyNiIsInVzZXJfbmFtZSI6InF5dGVzdCIsInNjb3BlIjpbInJlYWQiXSwiZXhwIjoxNzE2MTA3NTU5LCJhdXRob3JpdGllcyI6WyJjdiJdLCJqdGkiOiJiZGE2MmY3OS1lMWM4LTQyYjEtODJlYi0zNWI1OGQ1YTA4OWEiLCJjbGllbnRfaWQiOiJ0ZXN0X2NsaWVudCJ9.19Vf7XxjwlroLWBFuQh0mqeLHnAbQti8Q0c9EveFPyo

golang 生成token并解析

生成Token：

package main

import (
    "fmt"
    "time"
    "github.com/dgrijalva/jwt-go"
)

func main() {
    // set token claims
    claims := jwt.MapClaims{}
    claims["authorized"] = true
    claims["user_id"] = "1234"
    claims["exp"] = time.Now().Add(time.Hour * 24).Unix()

    // create token with claims
    token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)

    // set secret key
    secret := "my_secret_key"

    // sign token with secret key
    signedToken, err := token.SignedString([]byte(secret))
    if err != nil {
        fmt.Println(err)
        return
    }

    fmt.Println(signedToken)
}

解析Token：

package main

import (
    "fmt"
    "github.com/dgrijalva/jwt-go"
)

func main() {
    // set secret key
    secret := "my_secret_key"

    // sample token string
    tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJ0ZXN0IiwidXNlcl9pZCI6IjEyMzQiLCJleHAiOjE2MTUzODIwMzN9.P4nJ6UdLjUkC6BVmTQlJm6jKBO6wZKmJnR_8gCJb9XQ"

    // parse token
    token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
        // validate signing method
        if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
            return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
        }

        // return secret key
        return []byte(secret), nil
    })
    if err != nil {
        fmt.Println(err)
        return
    }

    // validate token claims
    if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
        fmt.Println(claims["authorized"], claims["user_id"])
    } else {
        fmt.Println(err)
    }
}