这是我的代码：
# Get the user's starting weight.
weight = input('What is your starting weight? ')
# Display the weight loss table.
for month in range(1, 7):
weight = -4
print('At the end of month', month,
'your weight will be', weight, 'lbs.')
我想尝试改变：
weight = -4
到：
weight -= 4
还要使输入成为一个字符串，如下所示：
# Get the user's starting weight.
weight = int(input('What is your starting weight? '))
# Display the weight loss table.
for month in range(1, 7):
weight -= 4
print('At the end of month', month,
'your weight will be', weight, 'lbs.')
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