简单条件下的语法错误（如果partyCHoice = R :)

Question

新程序员，在python 2.7中工作。

使用此代码，我在'if partychoice = R'行中得到语法错误，指出'='是无效语法。它如何赢得;让我分配变量。

此外，我敢肯定还有很多其他错误，但我必须从某处开始。

print "Welcome to 'Pass the Bill', where you will take on the role of a professional lobbyist trying to guide a bill through Congress and get it signed into law by the President!" 
start = raw_input(str ('Press Y to continue:')) 
print 'Great, lets get started!' 
partychoice = raw_input (str("Would you like to be a Republican or Democrat? Type 'R' for Republican or 'D' for Democrat.")) 
if partychoice = R: 
    print 'Ah, the Grand old Party of Lincoln and Reagan. Great Choice!' 
    replegchoice = raw_input (str("What type of bill what you like congress to introduce? Restrictions on abortions, lower income taxes, easier access to automatic weapons, private health plans, or stricter immigration laws? (A = abortion restrictions, L = lower taxes, AW = automatic weapons, H = private health plans, S = stricter immigration laws')) 
    if replegchoice = A or a 
      print 'A controversial choice, despite support of most Republicans, you are sure to face opposition from Democrats in Congress!' 
    if replegchoice = L or l 
      print 'A popular idea, Republicans in Congress are sure to support this idea, as will many American voters!' 
    if replegchoice = AW, aw, Aw, or AW 
      print 'Rural, midwest, and small town voters will love this, as will most Republicans in Congress. Democrats and voters in urban cities will surely be less supportive.' 
    if replegchoice = H or h 
      print 'Eimination of Medicare, Medicaid, and Obamacare! Republicans generally like the idea of making each person responsible for paying their own health care costs' 
    if replegchoice = S or s 
      print 'a popular idea supported by president Trump, this is sure face strong opposition from democrats and many voters.' 

谢谢大家。

Answer 1

您需要的语句来代替 “=”， “==”：

if partychoice = R:" 

“=” 是赋值运算符
“==” 是一个平等的运营商

eg

#assign something to a variable 
x = 5 
print x 
>>5 

#compare for equality 
y = 6 
if y == 6: 
    print y 
else: 
    print "y is not 6" 
>>6 

请务必在将来的帖子中使用信息标题，这些内容与您提问的问题有关。

Answer 2

行更改为

if partychoice == 'R': 

首先，你需要使用两个 '=' 字符。一个'='设置一个变量，两个比较是否相等。

其次要变量partychoice比较字符串“R”，所以你需要引号。没有引号，它认为你正在比较对另一个对象的引用。

Answer 3

对于条件您需要使用比较运算符==而不是赋值运算符=。

检查了这一点：https://www.tutorialspoint.com/python/python_basic_operators.htm

希望帮助！

Answer 4

有几个问题与代码：

1. 您正在使用赋值运算符，=，而不是比较操作，==。
2. 你需要记住使用'含和比较字符串时，您正在将其与可变R代替字母'R'
3. 我删除了raw_input函数内superfulous str()转换比较。这是不需要的，因为""定义了一个字符串。

4. 您应该简单地在结果上调用.lower()函数，这样您只需检查字符串的小写版本即可。它会为你节省很多时间。

   print "Welcome to 'Pass the Bill', where you will take on the role of a professional lobbyist trying to guide a bill through Congress and get it signed into law by the President!" 
   start = raw_input('Press Y to continue:') 
   print 'Great, lets get started!' 
   partychoice = raw_input("Would you like to be a Republican or Democrat? Type 'R' for Republican or 'D' for Democrat.").lower() 
   if partychoice == 'r': 
       print 'Ah, the Grand old Party of Lincoln and Reagan. Great Choice!' 
       replegchoice = raw_input ("What type of bill what you like congress to introduce? Restrictions on abortions, lower income taxes, easier access to automatic weapons, private health plans, or stricter immigration laws? (A = abortion restrictions, L = lower taxes, AW = automatic weapons, H = private health plans, S = stricter immigration laws") 
       if replegchoice == 'a': 
         print 'A controversial choice, despite support of most Republicans, you are sure to face opposition from Democrats in Congress!' 
       if replegchoice == 'l': 
         print 'A popular idea, Republicans in Congress are sure to support this idea, as will many American voters!' 
       if replegchoice == 'aw': 
         print 'Rural, midwest, and small town voters will love this, as will most Republicans in Congress. Democrats and voters in urban cities will surely be less supportive.' 
       if replegchoice == 'h': 
         print 'Eimination of Medicare, Medicaid, and Obamacare! Republicans generally like the idea of making each person responsible for paying their own health care costs' 
       if replegchoice == 's': 
         print 'a popular idea supported by president Trump, this is sure face strong opposition from democrats and many voters.'