想问一下我这个代码有什么问题?
我没懂最后代码有什么问题它测试都是对的 但是最后给出的结果是这个(Expected 12 test results, got 3. Perhaps excessive output or error in question? 预期有12个测试结果,得到3个。也许输出过多或有问题?)考虑以下功能:
def read_scores(filename):
input_file = open(filename, "r")
scores = input_file.read().split()
numbers =
input_file.close()
number_of_marks = len(numbers)
total_marks = sum(numbers)
print("There are {} score(s).".format(number_of_marks))
print("The total is {:.2f}.".format(total_marks))
print("The average is {:.2f}.".format(total_marks/number_of_marks))
read_scores(filename)函数使用文件名作为参数,从文件中读取所有分数,并显示它们的总和和平均值。您可以假定分数由空格分隔,并且文本文件包含未指定数量的分数。
修改上面的函数,并使用try ... except块来处理可能发生的任何异常。该功能应忽略任何负分数。如果参数文件名类型无效,则函数应显示“ERROR: Invalid input!”。如果参数文件名是一个空字符串,该函数应打印一条错误消息“ERROR: Invalid filename!”。如果无法打开该文件,则该功能应显示“ERROR: The file ... does not exist.”。其中...表示文件名。如果文件包含任何无效值,该函数应打印一条错误消息“ERROR: The input file contains invalid values.”。注意:如果可以打开文件,请记住正确关闭文件。
javascript:;
import os
import sys
def read_scores(filename):
try:
file_name,file_extension = os.path.splitext(filename)
if(file_name==""):
print("Error: Invalid filename!")
sys.exit()
input_file = open(filename,"r")
scores = input_file.read().split()
try:
numbers =
except ValueError:
print("Error: The input file contains invalid values")
sys.exit()
input_file.close()
number_of_marks = len(numbers)
total_marks = sum(numbers)
average = 0
try:
average = total_marks/number_of_marks
except ArithmeticError:
print("Error: No positive scores in the input file.")
sys.exit()
print("There are {} score(s).".format(number_of_marks))
print("The total is {:.2f}.".format(total_marks))
print("The average is {:.2f}.".format(average))
except TypeError:
print("Error: Invalid input!")
except FileNotFoundError:
print("Error: The file '{}{}' does not exist.".format(file_name,file_extension)) 这样试试:
import os
import sys
def read_scores(filename):
try:
file_name,file_extension = os.path.splitext(filename)
if(file_name==""):
print("Error: Invalid filename!")
sys.exit()
input_file = open(filename,"r")
scores = input_file.read().split()
try:
numbers =
except ValueError:
print("Error: The input file contains invalid values")
sys.exit()
input_file.close()
for i in numbers:
if i < 0:
print("Error: No positive scores in the input file.")
number_of_marks = len(numbers)
total_marks = sum(numbers)
average = 0
average = total_marks/number_of_marks
print("There are {} score(s).".format(number_of_marks))
print("The total is {:.2f}.".format(total_marks))
print("The average is {:.2f}.".format(average))
except TypeError:
print("Error: Invalid input!")
except FileNotFoundError:
print("Error: The file '{}{}' does not exist.".format(file_name,file_extension))
zltzlt 发表于 2020-8-14 18:42
这样试试:
import os
import sys
def read_scores(filename):
try:
file_name,file_extension = os.path.splitext(filename)
if(file_name==""):
print("ERROR: Invalid filename!")
sys.exit()
input_file = open(filename,"r")
scores = input_file.read().split()
try:
numbers =
except ValueError:
print("ERROR: The input file contains invalid values")
sys.exit()
input_file.close()
for i in numbers:
if i < 0:
print("ERROR: No positive scores in the input file.")
number_of_marks = len(numbers)
total_marks = sum(numbers)
average = 0
average = total_marks/number_of_marks
print("There are {} score(s).".format(number_of_marks))
print("The total is {:.2f}.".format(total_marks))
print("The average is {:.2f}.".format(average))
except TypeError:
print("ERROR: Invalid input!")
except FileNotFoundError:
print("ERROR: The file '{}{}' does not exist.".format(file_name,file_extension))
read_scores('empty.txt') 这个test 又出错了~ import os
import sys
def read_scores(filename):
try:
file_name,file_extension = os.path.splitext(filename)
if(file_name==""):
print("Error: Invalid filename!")
sys.exit()
try:
input_file = open(filename,"r")
except OSError:
print("Error: The file '{}{}' does not exist.".format(file_name, file_extension))
return
scores = input_file.read().split()
try:
numbers =
except ValueError:
print("Error: The input file contains invalid values")
sys.exit()
input_file.close()
for i in numbers:
if i < 0:
print("Error: No positive scores in the input file.")
return
number_of_marks = len(numbers)
total_marks = sum(numbers)
average = 0
average = total_marks/number_of_marks
print("There are {} score(s).".format(number_of_marks))
print("The total is {:.2f}.".format(total_marks))
print("The average is {:.2f}.".format(average))
except TypeError:
print("Error: Invalid input!") zltzlt 发表于 2020-8-14 18:51
系统说
您必须在代码中捕获FileNotFoundError。{:10_266:}
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