Python 在另一个函数中访问函数返回值
我有一个这样的程序,有一个StatFind类。这个类有三个方法。ncount方法返回字典列表:“finallist”。我需要将列表中的每个字典添加到mongodb数据库中 如何访问inserttomongo()方法中的finallist 代码当前给出了一个名称错误:Python 在另一个函数中访问函数返回值,python,oop,Python,Oop,我有一个这样的程序,有一个StatFind类。这个类有三个方法。ncount方法返回字典列表:“finallist”。我需要将列表中的每个字典添加到mongodb数据库中 如何访问inserttomongo()方法中的finallist 代码当前给出了一个名称错误: s.inserttomongo(finallist) #=> NameError: name 'finallist' is not defined 这是我的密码: !/usr/bin/python import pymong
s.inserttomongo(finallist)
#=> NameError: name 'finallist' is not defined
这是我的密码:
!/usr/bin/python
import pymongo,json
from datetime import date, timedelta
from collections import defaultdict
import os, sys,time,csv,glob
tsvs = glob.glob(sys.argv[1])
class StatFind:
def __init__(self,tsvs):
self.tsvs=tsvs
def ncount(self, tsvs):
if True:
finallist=[]
for path in tsvs:
....Someprocess....
returns a list
return finallist
def other(self):
samplestring= "something random"
print samplestring
def inserttomongo(self, finallist):
self.finallist=ncount().finallist
mongo=pymongo.Connection('localhost')
mongo_db=mongo['sample']
mongo_collection=mongo_db['users']
for dictvalue in self.finallist:
# for dictvalue in ncount(tsvs):
insert_id=mongo_collection.insert(dictvalue)
s=StatFind(tsvs)
s.ncount(tsvs)
s.other()
s.inserttomongo(finallist)
请特别阅读
您将在网上找到大量优秀的OO Python教程,如或
获取函数的返回值
例如,通过在命令行上运行python来使用解释器:
➤ python
Python 2.7.2+ (default, Jul 20 2012, 22:15:08)
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> def square(x):
... return x*x
...
>>> four_squared = square(4)
>>> four_squared
16
清理代码:
你的代码没有意义
nmaidcount().finallist
finallist
?永远都是这样李>
这就是我认为你的意思:
tsvs = glob.glob(sys.argv[1])
class StatFind:
# This is the instance initialiser.
def __init__(self,tsvs):
self.tsvs=tsvs
# here we define every instance of StatFind to have an attribute
# called 'finallist' which will be accessible by all methods
self.finallist = []
# We do our initialisation here, when we initialise our object,
# instead of in a separate method.
for path in self.tsvs:
finalist.append(do_something(path))
def inserttomongo(self):
# The 'self' parameter is automagically set up by python to
# refer to the instance when 'insertmongo()' is called on an instance
# for example, myInstance.insertmongo(), in which case
# self will be 'myInstance'
mongo=pymongo.Connection('localhost')
mongo_db=mongo['sample']
mongo_collection=mongo_db['users']
for dictvalue in self.finallist:
insert_id=mongo_collection.insert(dictvalue)
s=StatFind(tsvs) #This will call __init__() behind the scenes.
s.inserttomongo()
我猜可能对你有帮助。finallist是一个参数。您需要将一个参数传递给您的方法,如果该方法是一个标识符而不是一个常量(在您的例子中是一个名为“finallist”的标识符),则需要首先定义它!你好流程和附加到finallist是另一种方法。nmaidcount是一个输入错误,应该是ncount。我似乎仍然没有找到解决办法。请help@user1189851听起来您对Python和一般编程都是新手。我能给你的最好建议(除了亲自指导你)是运行命令行解释器(python
在命令行上),并用它来完成教程。您还可以尝试这样的想法,即函数可以由其返回值替换。例如,如果有一个函数def foo(x):return x*x
,则可以用结果替换对该函数的任何调用。例如:my_variable=foo(4)
与my_variable=16
tsvs = glob.glob(sys.argv[1])
class StatFind:
# This is the instance initialiser.
def __init__(self,tsvs):
self.tsvs=tsvs
# here we define every instance of StatFind to have an attribute
# called 'finallist' which will be accessible by all methods
self.finallist = []
# We do our initialisation here, when we initialise our object,
# instead of in a separate method.
for path in self.tsvs:
finalist.append(do_something(path))
def inserttomongo(self):
# The 'self' parameter is automagically set up by python to
# refer to the instance when 'insertmongo()' is called on an instance
# for example, myInstance.insertmongo(), in which case
# self will be 'myInstance'
mongo=pymongo.Connection('localhost')
mongo_db=mongo['sample']
mongo_collection=mongo_db['users']
for dictvalue in self.finallist:
insert_id=mongo_collection.insert(dictvalue)
s=StatFind(tsvs) #This will call __init__() behind the scenes.
s.inserttomongo()