Question

此部分代码应将输入和另一个变量（Score）写入文本文件。程序要求输入（因此if语句肯定正在运行）并且运行没有错误，但文本文件为空。奇怪的是，将此代码复制到空的python文件并运行它可以正常工作。这里发生了什么？

if Score > int(HighScores[1]):
    print("You beat the record with " + str(Score) + " points!")
    Name = input("What is your name?")
    BestOf = open("High Scores.txt", "w").close()
    BestOf = open("High Scores.txt", "a")
    BestOf.write(Name + "\n")
    BestOf.write(str(Score))

Answer 1

附加后我没有关闭文件。

BestOf.close()

修好了

Answer 2

尝试以'w +'模式打开文件。如果文件不存在，这将创建该文件。您还可以使用'os'模块检查文件是否退出。

    import java.sql.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;

import org.hibernate.validator.constraints.NotEmpty;
import org.springframework.format.annotation.DateTimeFormat;

@Entity
@Table(name="Users")
public class Users {

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="User_ID")
    private int ID;

    @Column(name="User_first_name")
    @NotEmpty(message="Field cannot be left blank")
    private String First_Name;

    @Column(name="user_last_name")
    private String Last_Name;

    @Column(name="user_contact")
    private int Contact;

    @Column(name="user_email")
    private String Email;

    @Column(name="user_date_birth")
    @DateTimeFormat(pattern="dd/MM/yyyy")
    private Date DateOfBirth;

    @Column(name="user_joining_date")
    private Date DateOfJoining;

    @Column(name="user_salary")
    @NotNull
    private int Salary;

    public int getID() {
        return ID;
    }

    public void setID(int iD) {
        ID = iD;
    }

    public String getFirst_Name() {
        return First_Name;
    }

    public void setFirst_Name(String first_Name) {
        First_Name = first_Name;
    }

    public String getLast_Name() {
        return Last_Name;
    }

    public void setLast_Name(String last_Name) {
        Last_Name = last_Name;
    }

    public int getContact() {
        return Contact;
    }

    public void setContact(int contact) {
        Contact = contact;
    }

    public String getEmail() {
        return Email;
    }

    public void setEmail(String email) {
        Email = email;
    }

    public Date getDateOfBirth() {
        return DateOfBirth;
    }

    public void setDateOfBirth(Date dateOfBirth) {
        DateOfBirth = dateOfBirth;
    }

    public Date getDateOfJoining() {
        return DateOfJoining;
    }

    public void setDateOfJoining(Date dateOfJoining) {
        DateOfJoining = dateOfJoining;
    }

    public int getSalary() {
        return Salary;
    }

    public void setSalary(int salary) {
        Salary = salary;
    }

}

Python：尝试附加到文件但没有写入任何内容

2 个答案: