访问值的元组的元组列表中的[错误]

Question

我使用了一个名为ANARCI进行编号抗体序列工具和程序的输出是这样的：

[((1, ' '), 'E'), ((2, ' '), 'V'), ..., ((113, ' '), 'A')] 

我想要将编号保存在.csv文件中，并且无法访问上面简短部分中显示的空字符串。其中一些将在其中有一个字母，我需要检查字符串是否为空。这是我写这样做代码：

with open(fileName + '.csv', 'wb') as myFile: 
    # sets wr to writer function in csv module 
    wr = csv.writer(myFile, quoting=csv.QUOTE_ALL) 
    # writes in headers 
    wr.writerow(headers) 
    # iterates through numbering 
    for row in numbering: 
     # gets to the innermost tuple 
     for tup in row: 
      # checks if the string contains a letter 
      if tup[1] != ' ': 
       # makes the number and letter a single string 
       numScheme = str(tup[0])+str(tup[1]) 
       # creates a list of values to write 
       varList = [baNumbering,numScheme,row[1]] 
       wr.writerow(varList) 
      else: 
       # if the string does not contain a letter, the list of values is created without the string 
       varList = [baNumbering,tup[0],row[1]] 
       wr.writerow(varList) 
     baNumbering = baNumbering + 1 

我这背后的想法是for row in numbering:让我到含元组中的元组，并for tup in row:可以让我检查最里面的元组的索引。我想要varList成为一个包含数字，编号（可能附带字母）的列表，然后是字母 - 如下所示：["1","1","E"]或["30","29B","Q"]。然而，我得到的错误：

Traceback (most recent call last): 
    File "NumberingScript.py", line 101, in <module> 
    Control() 
    File "NumberingScript.py", line 94, in Control 
    Num() 
    File "NumberingScript.py", line 86, in Num 
    SaveNumbering(numbering,numberingScheme) 
    File "NumberingScript.py", line 72, in SaveNumbering 
    WriteFile(numbering,numberingScheme,fileName) 
    File "NumberingScript.py", line 51, in WriteFile 
    if tup[1] != ' ': 
IndexError: string index out of range 

有没有更好的方式来访问元组中的字符串？我能找到的所有资源只包含元组列表，并没有提及我在这里所做的工作。

Answer 1

当tup获取'E'值并且您试图获取不存在的索引时异常会引发异常。

for row in numbering: 
      for tup in row: 
       if tup[1] != ' ': # Raised exception --> 'E'[1] 

如果我理解正确的目标，请尝试使用此：

DATA = [((1, ' '), 'E'), ((2, ' '), 'V'), ((113, ' '), 'A')] 

def get_tuples(data): 
    for item in data: 
     for element in item: 
      if isinstance(element, tuple): 
       yield element 
      else: 
       continue 

for tup in get_tuples(DATA): 
    print(tup) 

输出

(1, ' ') 
(2, ' ') 
(113, ' ')