参考函数的值

-1

一开始我想说我是使用Python的新手，我学到的所有东西都来自教程。我有关引用该值的问题。我正在写一些脚本，从网站上删除一些信息。所以，现在我的fynction返回表达式1的剧本我想校验值内参考函数的值

def MatchPattern(count): 
    sock = urllib.urlopen(Link+str(count)) 
    htmlSource = sock.read()        
    sock.close() 
    root = etree.HTML(htmlSource) 
    root = etree.HTML(htmlSource) 
    result = etree.tostring(root, pretty_print=True, method="html") 
    expr1 = check_reg(root) 
    expr2 = check_practice(root) 
    D_expr1 = no_ks(root) 
    D_expr2 = Registred_by(root) 
    D_expr3 = Name_doctor(root) 
    D_expr4 = Registration_no(root) 
    D_expr5 = PWZL(root) 
    D_expr6 = NIP(root) 
    D_expr7 = Spec(root) 
    D_expr8 = Start_date(root) 

    #-----Reg_practice----- 
    R_expr1 = Name_of_practise(root) 
    R_expr2 = TERYT(root) 
    R_expr3 = Street(root) 
    R_expr4 = House_no(root) 
    R_expr5 = Flat_no(root) 
    R_expr6 = Post_code(root) 
    R_expr7 = City(root) 
    R_expr8 = Practice_no(root) 
    R_expr9 = Kind_of_practice(root) 

    #------Serv_practice ----- 
    S_expr1 = TERYT2(root) 
    S_expr2 = Street2(root) 
    S_expr3 = House_no2(root) 
    S_expr4 = Flat_no2(root) 
    S_expr5 = Post_code2(root) 
    S_expr6 = City2(root) 
    S_expr7 = Phone_no(root) 

    return expr1 
    return expr2 
    return D_expr1 
    return D_expr2 
    return D_expr3 
    return D_expr4 
    return D_expr5 
    return D_expr6 
    return D_expr7 
    return D_expr8 

    #-----Reg_practice----- 
    return R_expr1 
    return R_expr2 
    return R_expr3 
    return R_expr4 
    return R_expr5 
    return R_expr6 
    return R_expr7 
    return R_expr8 
    return R_expr9 

    #------Serv_practice ----- 
    return S_expr1 
    return S_expr2 
    return S_expr3 
    return S_expr4 
    return S_expr5 
    return S_expr6 
    return S_expr7

：我定义的一些功能。我不知道该怎么做。你能帮我吗？我的功能是否正确？

编辑：我不能添加的答案，所以我修改我目前的职位

这是我所有的脚本。有些意见是我的母语，但我用英语

#! /usr/bin/env python 
#encoding:UTF-8- 

# ----------------------------- importujemy potrzebne biblioteki i skrypty ----------------------- 
# ------------------------------------------------------------------------------------------------ 
import urllib 
from lxml import etree, html 
import sys 
import re 
import MySQLdb as mdb 
from TOR_connections import * 
from XPathSelection import * 
import os 

# ------------------------------ Definiuje xPathSelectors ------------------------------------------ 
# -------------------------------------------------------------------------------------------------- 
# -------Doctors ----- 
check_reg = etree.XPath("string(//html/body/div/table[1]/tr[3]/td[2]/text())") #warunek Lekarz 
check_practice = etree.XPath("string(//html/body/div/table[3]/tr[4]/td[2]/text())") #warunek praktyka 

no_ks = etree.XPath("string(//html/body/div/table[1]/tr[1]/td[2]/text())") 
Registred_by = etree.XPath("string(//html/body/div/table[1]/tr[4]/td[2]/text())") 
Name_doctor = etree.XPath("string(//html/body/div/table[2]/tr[2]/td[2]/text())") 
Registration_no = etree.XPath("string(//html/body/div/table[2]/tr[3]/td[2]/text())") 
PWZL = etree.XPath("string(//html/body/div/table[2]/tr[4]/td[2]/text())") 
NIP = etree.XPath("string(//html/body/div/table[2]/tr[5]/td[2]/text())") 
Spec = etree.XPath("string(//html/body/div/table[2]/tr[18]/td[2]/text())") 
Start_date = etree.XPath("string(//html/body/div/table[2]/tr[20]/td[2]/text())") 

#-----Reg_practice----- 
Name_of_practise = etree.XPath("string(//html/body/div/table[2]/tr[1]/td[2]/text())") 
TERYT = etree.XPath("string(//html/body/div/table[2]/tr[7]/td[2]/*/text())") 
Street = etree.XPath("string(//html/body/div/table[2]/tr[8]/td[2]/text())") 
House_no = etree.XPath("string(//html/body/div/table[2]/tr[9]/td[2]/*/text())") 
Flat_no = etree.XPath("string(//html/body/div/table[2]/tr[10]/td[2]/*/text())") 
Post_code = etree.XPath("string(//html/body/div/table[2]/tr[11]/td[2]/*/text())") 
City = etree.XPath("string(//html/body/div/table[2]/tr[12]/td[2]/*/text())") 
Practice_no = etree.XPath("string(//html/body/div/table[3]/tr[4]/td[2]/text())") 
Kind_of_practice = etree.XPath("string(//html/body/div/table[3]/tr[5]/td[2]/text())") 

#------Serv_practice ----- 
TERYT2 = etree.XPath("string(//html/body/div/table[3]/tr[14]/td/table/tr[2]/td[2]/*/text())") 
Street2 = etree.XPath("string(//html/body/div/table[3]/tr[14]/td/table/tr[3]/td[2]/text())") 
House_no2 = etree.XPath("string(//html/body/div/table[3]/tr[14]/td/table/tr[4]/td[2]/*/text())") 
Flat_no2 = etree.XPath("string(//html/body/div/table[3]/tr[14]/td/table/tr[5]/td[2]/i/text())") 
Post_code2 = etree.XPath("string(//html/body/div/table[3]/tr[14]/td/table/tr[6]/td[2]/*/text())") 
City2 = etree.XPath("string(//html/body/div/table[3]/tr[14]/td/table/tr[7]/td[2]/*/text())") 
Phone_no = etree.XPath("string(//html/body/div/table[3]/tr[14]/td/table/tr[8]/td[2]/text())") 

# --------------------------- deklaracje zmiennych globalnych ---------------------------------- 
# ---------------------------------------------------------------------------------------------- 
decrease = 9 
No = 1 
Link = "http://rpwdl.csioz.gov.pl/rpz/druk/wyswietlKsiegaServletPub?idKsiega=" 

# --------------------------- funkcje zdefiniowane ---------------------------------- 
# ---------------------------------------------------------------------------------------------- 
def MatchPattern(count): 
    sock = urllib.urlopen(Link+str(count)) 
    htmlSource = sock.read()        
    sock.close() 
    root = etree.HTML(htmlSource) 
    root = etree.HTML(htmlSource) 
    result = etree.tostring(root, pretty_print=True, method="html") 
    expr1 = check_reg(root) 
    expr2 = check_practice(root) 
    D_expr1 = no_ks(root) 
    D_expr2 = Registred_by(root) 
    D_expr3 = Name_doctor(root) 
    D_expr4 = Registration_no(root) 
    D_expr5 = PWZL(root) 
    D_expr6 = NIP(root) 
    D_expr7 = Spec(root) 
    D_expr8 = Start_date(root) 

    #-----Reg_practice----- 
    R_expr1 = Name_of_practise(root) 
    R_expr2 = TERYT(root) 
    R_expr3 = Street(root) 
    R_expr4 = House_no(root) 
    R_expr5 = Flat_no(root) 
    R_expr6 = Post_code(root) 
    R_expr7 = City(root) 
    R_expr8 = Practice_no(root) 
    R_expr9 = Kind_of_practice(root) 

    #------Serv_practice ----- 
    S_expr1 = TERYT2(root) 
    S_expr2 = Street2(root) 
    S_expr3 = House_no2(root) 
    S_expr4 = Flat_no2(root) 
    S_expr5 = Post_code2(root) 
    S_expr6 = City2(root) 
    S_expr7 = Phone_no(root) 

    return expr1 
    return expr2 
    return D_expr1 
    return D_expr2 
    return D_expr3 
    return D_expr4 
    return D_expr5 
    return D_expr6 
    return D_expr7 
    return D_expr8 

    #-----Reg_practice----- 
    return R_expr1 
    return R_expr2 
    return R_expr3 
    return R_expr4 
    return R_expr5 
    return R_expr6 
    return R_expr7 
    return R_expr8 
    return R_expr9 

    #------Serv_practice ----- 
    return S_expr1 
    return S_expr2 
    return S_expr3 
    return S_expr4 
    return S_expr5 
    return S_expr6 
    return S_expr7 




# --------------------------- ustanawiamy polaczenie z baza danych ----------------------------- 
# ---------------------------------------------------------------------------------------------- 
con = mdb.connect('localhost', 'root', '******', 'SANBROKER', charset='utf8'); 

# ---------------------------- początek programu ----------------------------------------------- 
# ---------------------------------------------------------------------------------------------- 

with con: 
    cur = con.cursor() 
    cur.execute("SELECT Old_num FROM SANBROKER.Number_of_records;") 
    Old_num = cur.fetchone() 
    count = Old_num[0] 
    counter = input("Input number of rows: ") 

    # ----------------------- pierwsze połączenie z TORem ------------------------------------ 
    # ---------------------------------------------------------------------------------------- 
    #connectTor() 
    #conn = httplib.HTTPConnection("my-ip.heroku.com") 
    #conn.request("GET", "/") 
    #response = conn.getresponse() 
    #print(response.read()) 

    while count <= counter: # co dziesiata liczba 
     # --------------- pierwsze wpisanie do bazy danych do Archive -------------------- 
     with con: 
      cur = con.cursor() 
      cur.execute("UPDATE SANBROKER.Number_of_records SET Archive_num=%s",(count)) 

     # --------------------------------------------------------------------------------- 
     if decrease == 0: 
      MatchPattern(count) 

      # Now I wanna check some expresions (2 or 3) 
      # After that i wanna write all the values into my database 


      #------- ostatnie czynności: 
      percentage = count/100 
      print "rekordów: " + str(count) + " z: " + str(counter) + " procent dodanych: " + str(percentage) + "%" 
      with con: 
       cur = con.cursor() 
       cur.execute("UPDATE SANBROKER.Number_of_records SET Old_num=%s",(count)) 
      decrease = 10-1 
      count +=1 
     else: 
      MatchPattern(count) 

      # Now I wanna check some expresions (2 or 3) 
      # After that i wanna write all the values into my database 

      # ------ ostatnie czynności: 
      percentage = count/100 
      print "rekordów: " + str(count) + " z: " + str(counter) + " procent dodanych: " + str(percentage) + "%" 
      with con: 
       cur = con.cursor() 
       cur.execute("UPDATE SANBROKER.Number_of_records SET Old_num=%s",(count)) 
      decrease -=1 
      count +=1

来源

2013-04-24 user2110927

在功能，当'遇到return'，功能停止运行，并放置后的代码将被忽略。这意味着你的函数将在'return expr1'处停止。查看我的答案以获取更多详情。 – ibi0tux 2013-04-24 06:54:27

那么加一些，我假设check_reg是返回一个布尔值（True或False）的函数。

如果是这样的话，检查返回：

if expr1: 
    print "True." 
else: 
    print "False"

不止一种方法去做一件事，但基本上，if expr1:是所有你需要做的检查。

来源

2013-04-24 06:13:26

要捕捉函数的返回值，函数等号分配给一个名字，就像这样：

return_value = somefunction(some_value) 
print('The return value is ',return_value)

请记住，当遇到第一个return语句时，该功能将退出。所以如果你有多个return语句，只有第一个会执行。

如果您想要返回多个东西，请将它们添加到列表中，然后返回列表。

这是你的功能的改进版本：

def match_pattern(count): 

    sock = urllib.urlopen(Link+str(count)) 
    htmlsource = sock.read()        
    sock.close() 
    root = etree.HTML(htmlSource) 
    # root = etree.HTML(htmlSource) - duplicate line 
    # result = etree.tostring(root, pretty_print=True, method="html") 
    function_names = [check_reg, check_practice, no_ks, Registered_by, \ 
         Name_doctor, Registration_no, PWZL, NIP, Spec, Start_date, \ 
         Name_of_practise, TERYT, Street, House_no2, Flat_no, \ 
         Post_code2, City2, Phone_no] 
    results = [] 
    for function in function_names: 
     results.append(function(root)) 

    return results 

r = match_pattern(1) 
print r[0] # this will be the result of check_reg(root)

来源

2013-04-24 06:14:12

你已经发布的代码是相当ambigous。你能否修复这个标识让我们知道属于哪个功能以及哪个部分是脚本。

函数只能返回一个值。你不能这样做：

return something 
return something_else 
return ...

函数将返回第一个值时结束。你可以做的是返回一个包含所有值的列表，元组或字典。例如：

return (something,something_else,...)

或

return [something,something_else,...]

在你的情况，似乎更好地创建一个类，将有你想要的属性的所有值，并把这种功能到将设置方法属性值。

class Example(object): 
    def __init__ (self , link , count): 

     sock = urllib.urlopen(link+str(count)) 
     htmlSource = sock.read()        
     sock.close() 
     root = etree.HTML(htmlSource) 
     root = etree.HTML(htmlSource) 
     result = etree.tostring(root, pretty_print=True, method="html") 

     self.expr1 = check_reg(root) 
     self.expr2 = check_practice(root) 
     self.D_expr1 = no_ks(root) 
     ... 
     self.D_expr8 = Start_date(root) 

     #-----Reg_practice----- 
     self.R_expr1 = Name_of_practise(root) 
     ... 
     self.R_expr9 = Kind_of_practice(root) 

     #------Serv_practice ----- 
     self.S_expr1 = TERYT2(root) 
     ... 
     self.S_expr7 = Phone_no(root)

然后你就可以使用这个类，如：

exampleInstance = Example ("link you want to use" , 4) # the second argument is your 'count' value 

# Now you can use attributes of your class to get the values you want 
print exampleInstance . expr1 
print exampleInstance . S_expr7

来源

2013-04-24 06:14:35 ibi0tux

参考函数的值

回答

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