TypeError：int（）参数必须是字符串，类似字节的对象或数字，而不是“列表” [英] TypeError: int() argument must be a string, a bytes-like object or a number, not 'list'
问题描述
我无法将一个函数作为参数传递给另一个函数。这是我的代码：
I having trouble passing a function as a parameter to another function. This is my code:
ga.py：
def display_pageviews(hostname):
pageviews_results = get_pageviews_query(service, hostname).execute()
if pageviews_results.get('rows', []):
pv = pageviews_results.get('rows')
return pv[0]
else:
return None
def get_pageviews_query(service, hostname):
return service.data().ga().get(
ids=VIEW_ID,
start_date='7daysAgo',
end_date='today',
metrics='ga:pageviews',
sort='-ga:pageviews',
filters='ga:hostname==%s' % hostname,)
models.py：
class Stats(models.Model):
user = models.OneToOneField('auth.User')
views = models.IntegerField()
visits = models.IntegerField()
unique_visits = models.IntegerField()
updatestats.py：
class Command(BaseCommand):
def handle(self, *args, **options):
users = User.objects.all()
try:
for user in users:
hostname = '%s.%s' % (user.username, settings.NETWORK_DOMAIN)
stats = Stats.objects.update_or_create(
user=user,
views=display_pageviews(hostname),
visits=display_visits(hostname),
unique_visits=display_unique_visits(hostname),)
except FieldError:
print ('There was a field error.')
运行此命令： python manage.py updatestats 我收到错误消息：
When I run this: python manage.py updatestats I get the error:
TypeError：int（）参数必须是字符串，类似字节的对象或
数字，而不是列表
TypeError: int() argument must be a string, a bytes-like object or a number, not 'list'
我不知道是什么原因 这个。我尝试将其转换为字符串，但遇到相同的错误。有任何想法吗？
I don't know what's causing this. I've tried converting it to a string, but I get the same error. Any ideas?
完整追溯：
Traceback (most recent call last):
File "manage.py", line 20, in <module>
execute_from_command_line(sys.argv)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/core/management/__init__.py", line 353, in execute_from_command_line
utility.execute()
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/core/management/__init__.py", line 345, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/core/management/base.py", line 348, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/core/management/base.py", line 399, in execute
output = self.handle(*args, **options)
File "/Users/myusername/project/Dev/project_files/project/main/management/commands/updatestats.py", line 23, in handle
unique_visits=display_unique_visits(hostname),)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/manager.py", line 122, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/query.py", line 480, in update_or_create
obj = self.get(**lookup)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/query.py", line 378, in get
clone = self.filter(*args, **kwargs)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/query.py", line 790, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/query.py", line 808, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/sql/query.py", line 1243, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/sql/query.py", line 1269, in _add_q
allow_joins=allow_joins, split_subq=split_subq,
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/sql/query.py", line 1203, in build_filter
condition = self.build_lookup(lookups, col, value)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/sql/query.py", line 1099, in build_lookup
return final_lookup(lhs, rhs)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/lookups.py", line 19, in __init__
self.rhs = self.get_prep_lookup()
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/lookups.py", line 57, in get_prep_lookup
return self.lhs.output_field.get_prep_lookup(self.lookup_name, self.rhs)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/fields/__init__.py", line 1860, in get_prep_lookup
return super(IntegerField, self).get_prep_lookup(lookup_type, value)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/fields/__init__.py", line 744, in get_prep_lookup
return self.get_prep_value(value)
File "/Users/myusername/project/Dev/lib/python3.4/site-packages/django/db/models/fields/__init__.py", line 1854, in get_prep_value
return int(value)
TypeError: int() argument must be a string, a bytes-like object or a number, not 'list'
：
好的，我知道问题是什么。我使用了外壳程序来获取函数输出的类型：
Alright, I understand what the issue is. I used the shell to get the type of function output:
>>> type(display_pageviews('test.domain.com'))
<class 'list'>
我尝试过此操作，但仍被视为列表：
pv = pageviews_results.get('rows')[0]
return pv
推荐答案
错误说明，您无法将整个列表转换为整数。您可以从列表中获取索引并将其转换为整数：
What the error is telling, is that you can't convert an entire list into an integer. You could get an index from the list and convert that into an integer:
x = ["0", "1", "2"]
y = int(x[0]) #accessing the zeroth element
如果您尝试将整个列表转换为整数，则必须先将列表转换为字符串：
If you're trying to convert a whole list into an integer, you are going to have to convert the list into a string first:
x = ["0", "1", "2"]
y = ''.join(x) # converting list into string
z = int(y)
如果列表元素不是字符串，则在使用 str.join之前必须将它们转换为字符串：
If your list elements are not strings, you'll have to convert them to strings before using str.join:
x = [0, 1, 2]
y = ''.join(map(str, x))
z = int(y)
也如上所述以上，请确保您没有返回嵌套列表。
Also, as stated above, make sure that you're not returning a nested list.
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