Python从文件中读取

Question

所以我有这个Python代码我正在打开一个文件，并从中读取最大和最小分数百分比，然后显示最大分数的团队以及具有分得分是0.75和0.125 我不断收到此错误信息：

ValueError: invalid literal for int() with base 10: '0.75' 

我会很感激的任何帮助，请和谢谢。

这是我与http://www.filedropper.com/nfldata

工作文件下面是我的代码：

def create_score_list(nfl_file): 
    """Create a list of teams and scores from nfl_file.""" 
    # 2a create a score list and initialize it to empty 
    score_list = [] 

for line in nfl_file:    # 2b. get each line from the file 
    if line[0:28] == 'National Football Conference' or\ 
      'NFC EAST' in line or\ 
      'NFC NORTH' in line or\ 
      'NFC SOUTH' in line or\ 
      'NFC WEST' in line or\ 
      'AFC EAST' in line or\ 
      'AFC NORTH' in line or\ 
      'AFC SOUTH' in line or\ 
      'AFC WEST' in line: 
     continue     # skip header line 
    line_list = line.split(',')   # 2bI. csv => split on comma 
    # create tuple: 
    team_tuple = (int(line_list[4]), line_list[0]) 
    score_list.append(team_tuple)  # 2bII. append tuple 
return score_list 

Answer 1

这是因为有时line_list[4]是float，有时是string。但是你总是将它解析为int。另外，你需要先筛选CSV值跳过头，你现在正在做这样的：

if line[0:28] == 'National Football Conference' or\ 
     'American Football Conference' in line or\ 
     'NFC EAST' in line or\ 
     'NFC NORTH' in line or\ 
     'NFC SOUTH' in line or\ 
     'NFC WEST' in line or\ 
     'AFC EAST' in line or\ 
     'AFC NORTH' in line or\ 
     'AFC SOUTH' in line or\ 
     'AFC WEST' in line: 

但你缺少某些情况下。您可以通过检查line_list[4]中的值是否为float来简化它。

try: 
    score = float(line_list[4]) 
except ValueError: 
    continue # The value isn't a float 

所以create_score_list(nfl_file)是：

def create_score_list(nfl_file): 
    """Create a list of teams and scores from nfl_file.""" 
    # 2a create a score list and initialize it to empty 
    score_list = [] 

    for line in nfl_file:    # 2b. get each line from the file 
     line_list = line.split(',')   # 2bI. csv => split on comma 
     score = None 
     try: 
      score = float(line_list[4]) 
     except ValueError: 
      continue # The value isn't a float 

     # create tuple: 
     team_tuple = (score, line_list[0]) 
     score_list.append(team_tuple)  # 2bII. append tuple 
    return score_list