如何使用python将CSV文件附加到另一个CSV文件时跳过该文件的标题

Question

我收到来自API的CSV回复。我想将收到的CSV响应附加到我机器中已存在的CSV文件中。我面临的问题是它还附加了第二个CSV文件的标题。我想删除该标题。我还附上了追加后我的csv看起来的截图。

截图

screenshot of the response recieved 我正在尝试这段代码

response = requests.get(Link)
actual_file = glob.glob(path_to_data+'\\Data\\*')
new_target_file = path_to_data+'\\Data'+'\\'+State+'_'+date+'_'+St_Id+'.csv'
# Write to .CSV
if not os.path.exists(new_target_file):
   for x in response.text.split('\n')[1:]:
       f = open(actual_file[0], "a")
       f.write(x)
   f.close()
   os.rename(actual_file[0],new_target_file)
else: 
   logging.warning("File already exist")

Answer 1

您遇到的问题是识别响应，要跳过的行以及要保留的行。您已经实现了切片以在第一行之后提取响应行，假设实际内容在第二行开始。根据您描述的症状，这不是（总是）。

#fully describe header here,
header="STATION,STATION_ELEVATION,LATITUDE,LONGITUDE,..."

def isheader(line,header,delim=','):
    l = line.split(delim) #may want to fold case
    h = header.split(delim) #may want to fold case
    n = sum(list(set(l) & set(h)))
    return n==len(h)

response = requests.get(Link)
actual_file = glob.glob(path_to_data+'\\Data\\*')
new_target_file = path_to_data+'\\Data'+'\\'+State+'_'+date+'_'+St_Id+'.csv'
# Write to .CSV
if not os.path.exists(new_target_file):
    with open(actual_file[0], "a") as f:
        for x in response.text.split('\n')[1:]:
            if len(x) < 2: continue #skip empty lines
            if isheader(x,header,','): continue #skip header
            f.write(x+'\n')
    #with performs close automatically
    os.rename(actual_file[0],new_target_file)
else:
    logging.warning("File already exist")

看看这个问题，了解如何使用open， How to open a file using the open with statement

以下是如何比较两个列表（例如标题列表到行列表）的示例， Comparing two lists in Python