Python:For循环中的For循环？
我刚刚学习了编程和python的基础知识，作为“挑战”的一部分，我必须使用for循环打印每个学生的数据。我需要能够只显示学生的名字和他们的分数，而不只是像这样显示字典：Python:For循环中的For循环？,python,variables,for-loop,dictionary,Python,Variables,For Loop,Dictionary,我刚刚学习了编程和python的基础知识，作为“挑战”的一部分，我必须使用for循环打印每个学生的数据。我需要能够只显示学生的名字和他们的分数，而不只是像这样显示字典： 打印学生的名字 打印学生的家庭作业 打印学生的测验 打印学生的试卷 打印学生的家庭作业打印 学生的测验打印学生的测验 但我目前无法通过变量（在本例中是“学生”）访问字典的值。我必须在for循环中使用for循环吗 lloyd = { "name": "Lloyd", "homework": [90.0, 97.0,
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]
for i in students:
print i[i] #<------ I have no idea what to do here
lloyd={
“姓名”：“劳埃德”，
“家庭作业”：[90.0,97.0,75.0,92.0]，
“测验”：[88.0,40.0,94.0]，
“测试”：[75.0,90.0]
}
爱丽丝={
“姓名”：“爱丽丝”，
“家庭作业”：[100.0,92.0,98.0,100.0]，
“测验”：[82.0,83.0,91.0]，
“测试”：[89.0,97.0]
}
泰勒={
“姓名”：“泰勒”，
“家庭作业”：[0.0,87.0,75.0,22.0]，
“测验”：[0.0,75.0,78.0]，
“测试”：[100.0，100.0]
}
学生=[劳埃德、爱丽丝、泰勒]
对于我的学生：
打印i[i]#您应该将i[i]
替换为i[“name”]
。当您迭代students
时，每次迭代都会得到字典，实例值存储在i
中
为了访问字典值，您需要使用key进行访问（dict是key，python中的值对）；在您的情况下，您希望使用name
作为键进行访问。您应该将i[i]
替换为i[“name”]
。当您迭代students
时，每次迭代都会得到字典，实例值存储在i
中
for d in students:
print d["name"],d["homework"],d["quizzes"],d["tests"]
为了访问字典值，您需要使用key进行访问（dict是key，python中的值对）；在您的情况下，您希望使用name
作为键进行访问。您应该将i[i]
替换为i[“name”]
。当您迭代students
时，每次迭代都会得到字典，实例值存储在i
中
for d in students:
print d["name"],d["homework"],d["quizzes"],d["tests"]
为了访问字典值，您需要使用key进行访问（dict是key，python中的值对）；在您的情况下，您希望使用name
作为键进行访问。您应该将i[i]
替换为i[“name”]
。当您迭代students
时，每次迭代都会得到字典，实例值存储在i
中
for d in students:
print d["name"],d["homework"],d["quizzes"],d["tests"]
为了访问字典值，您需要使用key进行访问（dict是key，python中的值对）；在您的情况下，您希望使用名称
作为键进行访问。好的，请尝试以下操作：
for d in students:
print d["name"],d["homework"],d["quizzes"],d["tests"]
for i in students:
for j in i:
print "%s -> %s", % (j, i[j])
这就是你要找的吗？好的，试试这个：
for i in students:
for j in i:
print "%s -> %s", % (j, i[j])
这就是你要找的吗？好的，试试这个：
for i in students:
for j in i:
print "%s -> %s", % (j, i[j])
这就是你要找的吗？好的，试试这个：
for i in students:
for j in i:
print "%s -> %s", % (j, i[j])
这就是您要找的吗？注释代码：
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]
for student in students:
print student # The dictionnary, so...
for j in student:
print student[j] # Print each value
注释代码：
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]
for student in students:
print student # The dictionnary, so...
for j in student:
print student[j] # Print each value
注释代码：
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]
for student in students:
print student # The dictionnary, so...
for j in student:
print student[j] # Print each value
注释代码：
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]
for student in students:
print student # The dictionnary, so...
for j in student:
print student[j] # Print each value
在你的循环中，我已经是学生了：
for i in students:
print i
{'quizzes': [88.0, 40.0, 94.0], 'tests': [75.0, 90.0], 'name': 'Lloyd', 'homework': [90.0, 97.0, 75.0, 92.0]}
然后，您可以按如下方式显示所需信息：
print i['name']
您需要阅读以下内容：在您的循环中，i已经是学生：
for i in students:
print i
{'quizzes': [88.0, 40.0, 94.0], 'tests': [75.0, 90.0], 'name': 'Lloyd', 'homework': [90.0, 97.0, 75.0, 92.0]}
然后，您可以按如下方式显示所需信息：
print i['name']
您需要阅读以下内容：在您的循环中，i已经是学生：
for i in students:
print i
{'quizzes': [88.0, 40.0, 94.0], 'tests': [75.0, 90.0], 'name': 'Lloyd', 'homework': [90.0, 97.0, 75.0, 92.0]}
然后，您可以按如下方式显示所需信息：
print i['name']
您需要阅读以下内容：在您的循环中，i已经是学生：
for i in students:
print i
{'quizzes': [88.0, 40.0, 94.0], 'tests': [75.0, 90.0], 'name': 'Lloyd', 'homework': [90.0, 97.0, 75.0, 92.0]}
然后，您可以按如下方式显示所需信息：
print i['name']
您需要阅读以下内容：尝试以下内容：
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]
for i in students:
total=0;
for s in i['quizzes']:
total=total+s;
print "Name: "+i['name']+" Score:"+str(total);
试试这个：
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]
for i in students:
total=0;
for s in i['quizzes']:
total=total+s;
print "Name: "+i['name']+" Score:"+str(total);
试试这个：
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]
for i in students:
total=0;
for s in i['quizzes']:
total=total+s;
print "Name: "+i['name']+" Score:"+str(total);
试试这个：
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]
for i in students:
total=0;
for s in i['quizzes']:
total=total+s;
print "Name: "+i['name']+" Score:"+str(total);
我尝试打印学生[I]，但它返回一个错误：“列表索引必须是整数，而不是dict”，只需使用print I
。简单。我需要能够只显示学生的名字和他们的分数，而不只是显示字典。你能告诉计算分数的逻辑吗？你能把你的解决方案作为答案而不是评论发布吗？我尝试过打印学生[I]，但它返回一个错误：“列表索引必须是整数，而不是dict”只需使用打印i