Question

我是Python的新手，在输入“n”或“N”后，在表格中打印信息时遇到问题。代码如下。我可能遗漏了一些简单但却无法解决的问题。任何帮助表示赞赏。

结果如下。如您所见，即使在打印N之后，它仍继续要求速度输入：

以MPH.50输入速度输入以小时计的行程时间你还有另一个计算输入吗？（输入y表示是，或输入N表示否：）y 以MPH.60输入速度输入以小时计的行程时间你还有另一个计算输入吗？（输入y表示是，或输入N表示否：）y 以MPH.75输入速度输入以小时计的行程时间你还有另一个计算输入吗？（输入y表示是，或输入N表示否：）n 以MPH输入速度。

'＃此程序将计算车辆行驶的距离＃以英里为单位，使用速度（英里/小时）和行驶的小时数。

# Create a variable to represent the maxium travel time in hours.
max_travel = 9
min_travel = 1
# Create a variable to represent the maximum speed.
max_speed = 120
# Create a variable to represent the minimum speed.
min_speed = 1
#Define a variable to represent continuation of the program
another = ["y", "Y"]
# Create a variable for saved results to be printed in table
results = []

# main module
def main():

    # Get the speed in MPH.
    speed = int(input('Enter the speed in MPH.'))

    # Validate that the speed entered is not out of range.
    while speed > max_speed or speed < min_speed:
      if speed > max_speed:
            print('ERROR: the speed entered must be a lower number between 1   and 120.')
            speed = int(input('Enter a lower speed in MPH.'))

        if speed < min_speed:
            print('ERROR: the speed entered must be a higher number between 1 and 120.')
            speed = int(input('Enter a higher speed in MPH.'))

    # Ask user to input travel time in hours
    travel_time = int(input('Enter the time travelled in hours.'))

    # Validate that the time travelled is within the range of 1 to 9 hours.
    while travel_time > max_travel or travel_time < min_travel:
        if travel_time > max_travel:
            print('ERROR: the time must be a lower number between 1 and 9.')
            travel_time = int(input('Enter a different time travelled in hours.'))

    # Validate that the time travelled is within the range of 1 to 9 hours.
        if travel_time < min_travel:
            print('ERROR: the time must be a higher number between 1 and 9.')
            travel_time = int(input('Enter a different time travelled in hours.'))

    # This will cause the loop, with the exception of the first loop,
    # to depend on a 'y' or 'Y' entry to enter any additional entries. 
    first = False 

    # Calculate again?
    another = input('Do you have another calculation to enter? ' + \
            '(Enter y for yes or N for no: )')

    # This loop will continue until something other
    # than 'y' or 'Y' is entered when prompted.
    while another == 'y' or 'Y':
        main()

    # Calculations saved for table
    input_tuple =speed, travel_time

    # Print the column headings in a table.
    # Print the time travelled and the
    # result of the distance calculation 
    print()
    print('Hours\t\tDistance')
    print('---------------------')

    # Print saved entries and calculations in table
    if another !='y' or 'Y':
        for input_tuple in results:

    # Calculate the distance travelled
    distance = speed * travel_time
    print("'%s'\t\t'%s'" %(travel_time, distance))

# Call the main function.
def main():
"""
"""'

Answer 1

请注意代码附带了许多缩进错误。说过你至少应该纠正

while another == 'y' or 'Y'

到

while another == 'y' or another == 'Y'

确实or 'Y'始终评估为True

Python 3的新功能 - 尝试将结果打印到表格中

1 个答案: