关于python：TypeError：必须使用’class name’实例作为第一个参数调用未绑定方法’method name’（改为使用str实例）

TypeError: unbound method 'method name' must be called with 'class name' instance as first argument (got str instance instead)

嗨，我正在尝试将simpletmdb python包装用于"电影数据库"API，但我无法通过此问题。

当我试图创建对象并调用获取电影信息的方法时，我总是得到这个错误。

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in info
response = TMDB._request('GET', path, params)
TypeError: unbound method _request() must be called with TMDB instance as first argument (got str instance instead)

我的代码是：

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from tmdbsimple import TMDB

tmdb = TMDB('API_KEY')
movie = tmdb.Movies(603)
response = movie.info()
print movie.title

simpleTMDB包装器的必要部分是，movies类是TMDB的一个子类：

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class TMDB:
def __init__(self, api_key, version=3):
TMDB.api_key = str(api_key)
TMDB.url = 'https://api.themoviedb.org' + '/' + str(version)

def _request(method, path, params={}, json_body={}):
url = TMDB.url + '/' + path + '?api_key=' + TMDB.api_key
if method == 'GET':
headers = {'Accept': 'application/json'}
content = requests.get(url, params=params, headers=headers).content
elif method == 'POST':
for key in params.keys():
url += '&' + key + '=' + params[key]
headers = {'Content-Type': 'application/json', \
'Accept': 'application/json'}
content = requests.post(url, data=json.dumps(json_body), \
headers=headers).content
elif method == 'DELETE':
for key in params.keys():
url += '&' + key + '=' + params[key]
headers = {'Content-Type': 'application/json', \
'Accept': 'application/json'}
content = requests.delete(url, data=json.dumps(json_body), \
headers=headers).content
else:
raise Exception('method: ' + method + ' not supported.')
response = json.loads(content.decode('utf-8'))
return response

#
# Set attributes to dictionary values.
# - e.g.
# >>> tmdb = TMDB()
# >>> movie = tmdb.Movie(103332)
# >>> response = movie.info()
# >>> movie.title # instead of response['title']

class Movies:
""""""
def __init__(self, id=0):
self.id = id

# optional parameters: language
def info(self, params={}):
path = 'movie' + '/' + str(self.id)
response = TMDB._request('GET', path, params)
TMDB._set_attrs_to_values(self, response)
return response

包装可在以下网址找到：https://github.com/celiao/tmdbsimple我只是想遵循在那里找到的例子。

任何帮助都会很好！

正如github上的@qazwsxpawel所建议的那样，@staticmethod修饰符已经添加到tmdb类方法请求中，并将属性设置为值。如果升级tmdbsimple的版本，这些示例现在应该可以在python 2.7中使用了。https://pypi.python.org/pypi/tmdbsimple

相关讨论

这可能与您对方法_request的缩进有关。试试这个代码：

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class TMDB:
def __init__(self, api_key, version=3):
TMDB.api_key = str(api_key)
TMDB.url = 'https://api.themoviedb.org' + '/' + str(version)

def _request(method, path, params={}, json_body={}):
url = TMDB.url + '/' + path + '?api_key=' + TMDB.api_key

if method == 'GET':
headers = {'Accept': 'application/json'}
content = requests.get(url, params=params, headers=headers).content
elif method == 'POST':
for key in params.keys():
url += '&' + key + '=' + params[key]
headers = {'Content-Type': 'application/json', \
'Accept': 'application/json'}
content = requests.post(url, data=json.dumps(json_body), \
headers=headers).content
elif method == 'DELETE':
for key in params.keys():
url += '&' + key + '=' + params[key]
headers = {'Content-Type': 'application/json', \
'Accept': 'application/json'}
content = requests.delete(url, data=json.dumps(json_body), \
headers=headers).content
else:
raise Exception('method: ' + method + ' not supported.')
response = json.loads(content.decode('utf-8'))
return response

#
# Set attributes to dictionary values.
# - e.g.
# >>> tmdb = TMDB()
# >>> movie = tmdb.Movie(103332)
# >>> response = movie.info()
# >>> movie.title # instead of response['title']

class Movies:
""""""
def __init__(self, id=0):
self.id = id

# optional parameters: language
def info(self, params={}):
path = 'movie' + '/' + str(self.id)
response = TMDB._request('GET', path, params)
TMDB._set_attrs_to_values(self, response)
return response

请看这篇文章，它解释了为什么在使用from foo import *语法时不导入单前导下划线方法。