使用Python Turtle库时出现语法错误，请求排查修复

以下是你的代码中存在的问题及修复方案：

原代码 #

from turtle import*

student_grades=[]
the_number_of_grades=int(input('the number of grades that are going to be proccesed:')
                         
for d in range (the_number_of_grades) :

    student_grades=int(input('please input all of your grades:')

    student_grades.append(student_grades)

grade_point_average=round(sum(student_grades) /len(studnet_grades),2)

clear()
penup()
setpos(-10,180)
write('MY GRADE POINT AVERAGE=' +str(grade_point_average))
setpos(80,180)
if grade_point_average > 70:
    write('YOUR GRADE POINT AVERAGE IS V.GOOD')
elif grade_point_average > 50:
    write('YOUR GRADE POINT AVERAGE IS LOW')
else:
    write('YOU HAVE GOT YOUR FIRST WARNING!:')
          

Ssetpos(0,0)
pd()
goto(180,0)
goto(0,0)
goto(0,150)
goto(0,0)


for d in range (len(student_grades)) :
    goto((d+1)*20 , grades[d])
    dot(5, 'RED')
    write(student_grades[d],False,'centre')
ht() 

错误点及修复 #

• 括号不匹配：两处input()调用末尾缺少闭合括号)，直接触发语法错误
• 变量覆盖：循环内将列表student_grades重新赋值为输入的整数，导致后续无法调用append()方法，需改用新变量接收输入值
• 拼写错误：计算平均分时把student_grades拼写成studnet_grades，引发变量未定义错误
• 函数名笔误：Ssetpos应为turtle库的setpos函数
• 未定义变量：绘图循环中使用的grades[d]从未定义，应替换为student_grades[d]
• 参数拼写错误：write()方法中的对齐参数'centre'应为'center'

修正后的代码 #

from turtle import*

student_grades = []
# 修复括号不匹配问题
the_number_of_grades = int(input('the number of grades that are going to be processed:'))
                         
for d in range(the_number_of_grades):
    # 用新变量接收输入，避免覆盖列表
    grade = int(input('please input your grade:'))
    student_grades.append(grade)

# 修复拼写错误：studnet_grades -> student_grades
grade_point_average = round(sum(student_grades) / len(student_grades), 2)

clear()
penup()
setpos(-10, 180)
write('MY GRADE POINT AVERAGE=' + str(grade_point_average))
setpos(80, 180)
if grade_point_average > 70:
    write('YOUR GRADE POINT AVERAGE IS V.GOOD')
elif grade_point_average > 50:
    write('YOUR GRADE POINT AVERAGE IS LOW')
else:
    write('YOU HAVE GOT YOUR FIRST WARNING!:')
          
# 修复函数名笔误：Ssetpos -> setpos
setpos(0, 0)
pd()
goto(180, 0)
goto(0, 0)
goto(0, 150)
goto(0, 0)

for d in range(len(student_grades)):
    # 修复未定义变量：grades[d] -> student_grades[d]
    goto((d+1)*20, student_grades[d])
    dot(5, 'RED')
    # 修复参数拼写：centre -> center
    write(student_grades[d], False, 'center')
ht() 

内容的提问来源于stack exchange，提问作者omarry barry