我遇到了这个错误信息:
TypeError: add_header() 正好接受 3 个参数(给定 2 个)
使用这些参数时:
testService("SomeServiceName", "POST", "[编辑有效 url]", ('Content-type','application/json'), [编辑有效 json])
通常此错误意味着我没有将“self”作为参数传递,但看到此方法未在类中被调用,我不确定该怎么做。我试过在参数和方法内部将 self 作为参数传递。我试过将 header 括在方括号和圆括号中。当我传递“self”时,我收到错误消息,指出 self 未定义,当我使用方括号而不是圆括号时,我收到与上述相同的错误。
有人拥有神奇的 Python 调试技能吗?非常感谢您抽出宝贵时间查看此内容!
def testService(name, verb, url, header="", requestBody=""):
#Log out the name of the request we're testing
if (name is not None) or (name.strip() is not ""):
print "Checking " + name + "\n\n"
# Make URL with StoreNumber
if (url is not None) or (url is not ""):
testUrl = url
# If specified verb is GET
if verb.strip().upper() == "GET":
# Create request
req = urllib2.Request(testUrl)
print "Making request with URL: " + testUrl + "\n\n"
# Send request
try:
response = urllib2.urlopen(req)
# If service returns 200 Okay
print "Connection to " + name + " Service successful. Returned with code " + str(response.code) + "\n\n"
# Log response
print "Response: " + response.read() + "\n\n"
# Handle exceptions
# If HTTP Error
except HTTPError as e:
if hasattr(e, 'reason'):
print name + ' failed to reach a server.'
print 'Reason: ', e.reason
elif hasattr(e, 'code'):
print e.code
elif hasattr(e, 'message'):
print e.message
pass
# If URL was the problem
except URLError as e:
if hasattr(e, 'reason'):
print name + ' failed to reach a server.'
if str(e.reason) == "[Errno 11004] getaddrinfo failed":
print "[Errno 11004] getaddrinfo failed with bad url: " + testUrl + "\n\n"
else:
print 'Reason: ', e.reason
elif hasattr(e, 'code'):
print 'Error code: ', e.code
elif hasattr(e, 'message'):
print e.message
pass
# If specified verb was POST
elif verb.strip().upper() == "POST":
# Check for None requestBody
if (requestBody is not None) or (requestBody.strip() is not ""):
data = urllib.urlencode(requestBody)
# Create request
req = urllib2.Request(testUrl, data)
# Check for header
if (header is not None) or (header.strip() is not ""):
req.add_header(header)
# YO YO THE BELOW CODE IS INCOMPLETE PLEASE FINISH
# Log request with URL and Data
print "Making request with URL: " + testUrl + " and data: THIS PART IS UNFINISHED PLEASE FINISH ME \n\n"
try:
response = urllib2.urlopen(req)
# If service returns 200 Okay
print "Connection to " + name + " Service successful. Returned with code " + str(response.code) + "\n\n"
# Log response
print "Response: " + response.read() + "\n\n"
# Handle exceptions
# If HTTP Error
except HTTPError as e:
if hasattr(e, 'code'):
print e.code
elif hasattr(e, 'message'):
print e.message
elif hasattr(e, 'reason'):
print name + ' failed to reach a server.'
print 'Reason: ', e.reason
pass
except URLError as e:
if hasattr(e, 'reason'):
print name + ' failed to reach a server.'
if str(e.reason) == "[Errno 11004] getaddrinfo failed":
print "[Errno 11004] getaddrinfo failed with bad url: " + url + "\n\n"
else:
print 'Reason: ', e.reason
elif hasattr(e, 'code'):
print 'Error code: ', e.code
elif hasattr(e, 'message'):
print e.message
pass
# Header non-existent in testService call
else:
print "Service header not provided. Exiting program"
sys.exit()
# Requesty Body not present in testService call
else:
print "Service request body not provided in code. Exiting program"
sys.exit()
# If specified verb is not supported (Currently only GET and POST are supported)
else:
print name + " Service written with HTTP verb other than GET or POST. Exiting program"
sys.exit()
else:
print "Service url not provided in code. Exiting program"
sys.exit()
else:
print "Service name not provided in code. Exiting program"
sys.exit()
最佳答案
来自documentation , add_header
接受两个参数。你用一个参数调用它,一个有两个值的元组。
你应该做什么:
req.add_header(key, value)
您当前正在做的事情是因为您将 header 作为元组获取:
req.add_header((key, value,)) # aka passing a tuple with both arguments to the key parameter
您需要解压元组:
req.add_header(header[0], header[1])
或者更好,使用 splat运算符(*
):
req.add_header(*header) # Does the same thing as above
此外,您使用空字符串作为 header
的默认参数,而当它被提供时它是一个元组。您可能应该将默认值更改为元组或 None
。
关于python - add_header 期望 3 个参数而不只是键/值,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/21832659/