Python從請求響應中跳過標題行

Question

我正在查詢服務以獲取 csv 數據，我想通過跳過標題信息代碼將此 csv 提取附加到另一個文件中 -

response = requests.get('http://myservice.com&format=csv')
with open('out.csv', 'a', new like='') as f:
   writer = csv.writer(f)
   for line in response.iter_lines():
        next(line)
        writer.writerow(line.decode('utf-8').split('|'))

嘗試了上述但我收到錯誤

'bytes' 對象不是迭代器

Answer 1

response.iter_lines()是迭代器， lines是迭代的值。 所以調用next()沒有多大意義。

你可以：

iter_lines = response.iter_lines()
next(iter_lines, None)
for line in iter_lines:
    writer.writerow(line.decode('utf-8').split('|'))

您也可以嘗試直接讀入csv.DictReader ，例如：

response = requests.get('http://myservice.com&format=csv')
with open('out.csv', 'a') as f:
    reader = csv.DictReader(response.text.splitlines(), delimiter='|')
    writer = csv.DictWriter(f, reader.fieldnames)
    writer.writerows(reader)

Answer 2

試試

response = 
requests.get('http://myservice.com&format=csv')
with open('out.csv', 'a', new like='') as f:
    writer = csv.writer(f)
    rows = response.iter_lines()
    next(rows)
    for line in rows:
        writer.writerow(line.decode('utf-8').split('|'))

rows是需要跳過標題的迭代器，而line是每行讀取的實際內容。

for循環簡單地遵循迭代協議，即

• 它通過在對象上調用iter獲得一個迭代器（一個迭代器返回自身，在這種情況下）
• 它不斷調用next直到引發StopIteration異常