Question

我从Djanjo 1.8升级到2.1

我注意到当我尝试使用导入的模块时，找不到该模块

示例1

from pandas import DataFrame
data = [list1,list2,list3]
DataFrame.from_records(data, columns = ['Word','Score','Word','Score','Word'])

    Word    Score   Word    Score   Word
0   (word1, 0.6037212610244751) (word2, 0.5418980717658997) (word3, 0.5389199256896973) (word4, 0.51054847240448)   (word5, 0.49834704399108887)
1   (word6, 0.6037212610244751) (word7, 0.5418980717658997) (word8, 0.5389199256896973) (word9, 0.51054847240448)   (word10, 0.49834704399108887)
2   (word11, 0.6037212610244751)    (word12, 0.5418980717658997)    (word13, 0.5389199256896973)    (word14, 0.51054847240448)  (word15, 0.49834704399108887)

这将导致from var_dump import var_dump from django.db import connection def get_available_id(): with connection.cursor() as cursor: query = """SELECT * FROM `stackoverflow` ;""" cursor.execute(query) row = cursor.fetchone() return row var_dump(get_available_id())

完全转储

NameError: name 'connection' is not defined

如果我在功能root@fbb4988d3d17:/var/www/api.domain.com# python manage.py shell < sql/import.py Traceback (most recent call last): File "manage.py", line 10, in <module> execute_from_command_line(sys.argv) File "/usr/local/lib/python3.5/dist-packages/django/core/management/__init__.py", line 381, in execute_from_command_line utility.execute() File "/usr/local/lib/python3.5/dist-packages/django/core/management/__init__.py", line 375, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/usr/local/lib/python3.5/dist-packages/django/core/management/base.py", line 316, in run_from_argv self.execute(*args, **cmd_options) File "/usr/local/lib/python3.5/dist-packages/django/core/management/base.py", line 353, in execute output = self.handle(*args, **options) File "/usr/local/lib/python3.5/dist-packages/django/core/management/commands/shell.py", line 92, in handle exec(sys.stdin.read()) File "<string>", line 27, in <module> File "<string>", line 8, in get_available_id NameError: name 'connection' is not defined中导入connection模块，一切正常

示例2

get_answers

这有效。

我该怎么做才能确保示例1与全局导入一起使用。

我正在运行这样的代码 from var_dump import var_dump def get_available_id(): from django.db import connection with connection.cursor() as cursor: query = """SELECT * FROM `stackoverflow` ;""" cursor.execute(query) row = cursor.fetchone() return row var_dump(get_available_id())

Answer 1

通过将我要运行的类移到单独的文件中来解决问题。

#class_a.py
import re
class A:
    def word_to_list(str):
        words = re.split("(\s+)", str)
        return words

a = A()
a.word_to_list('bob is your uncle')

运行python manage.py shell < sql/class_a.py会产生NameError: name 're' is not defined

解决方案是

#class_a.py
import re
class A:
    def word_to_list(str):
        words = re.split("(\s+)", str)
        return words

然后

#runner.py
from class_a import A
a = A()
a.word_to_list('bob is your uncle')

运行python manage.py shell < sql/runner.py

Python3在django函数中使用导入的模块

1 个答案: