python - 如何在 Python 程序中使用两个 != 中断？

Question

问题陈述、所有变量和给定/已知数据我需要一个程序，一旦在输入名称和输入等级中输入 0，它就会中断并显示结果。我知道如何在名义上做到这一点，但我该如何添加另一个休息时间？喜欢成绩 !="0"？

目前我的程序:

students = []
grades = []

while True:
    name = input ("Enter a name: ")
    if  name.isalpha() == True and name != "0":
        while True:
            grade = input("Enter a grade: ")
            if grade.isdigit()== True:
                grade = int(grade)
                if grade >= 1 and grade <= 10:
                    if name in students:
                        index = students.index(name)
                        grades[index].append(grade)
                        break
                    else:
                        students.append(name)
                        grades.append([grade])
                        break
                else:
                    print("Grade is not valid. Try to enter it again!")
    elif name == "0":
        print("A zero is entered!")
        break
    else:
        print ("Grade is not valid. Try to enter it again!")

for i in range(0,len(students)):
    print("NAME: ", students[i])
    print("GRADES: ", grades[i])
    print("AVERAGE: ", round(sum(grades[i])/len(grades[i]),1), "\n")

还有什么方法可以让 Python 忽略输入函数中的空格？

示例:我输入的成绩中有“________8”(_ 是空格)，但程序不想忽略它，我如何让它忽略空格并直接接受数字？

Answer 1

剥离() 方法

使用 string 的 strip() 方法去除空格。

演示:

>>> a = "  Go  "
>>> a.strip()
'Go'
>>> a.rstrip()
'  Go'
>>> a.lstrip()
'Go  '
>>> 

---

您的代码可以正常工作。产生正确的输出。

---

使用字典保存学生记录。

演示:

import collections
student_record = collections.defaultdict(list)

while True:
    name = raw_input("Enter a name: ").strip()
    if name=="0":
        print "A zero is entered!"
        break

    if not name.isalpha():
        print "Name is no valid. Try again. Enter alpha value only."
        continue

    while True:
        grade = raw_input("Enter a grade: ").strip()
        if grade.isdigit():
            grade = int(grade)
            if 1<=grade <= 10:
                student_record[name].append(grade)
                break
            else:
                print "Grade is not valid. Try again. Enter digit values between 1 and 10."
        else:
            print "Grade is not valid. Try again. Enter digit values."

for i, j in student_record.items():
    print "\nNAME: ", i
    print "GRADES: ", j
    print "AVERAGE: ", round(sum(j)/len(j),1)

输出:

$ python test1.py
Enter a name: ABC
Enter a grade: 2
Enter a name: XYZ
Enter a grade: 5
Enter a name: ABC
Enter a grade: 6
Enter a name: 0
A zero is entered!

NAME:  XYZ
GRADES:  [5]
AVERAGE:  5.0

NAME:  ABC
GRADES:  [2, 6]
AVERAGE:  4.0

---

注意:

在 Python 2.x 中使用 raw_input()

在 Python 3.x 中使用 input()