我正在学习python，正在为自己做一个练习，我遇到了一些问题。
如果我输入＆＃34;是＆＃34;这将返回无效的答案，因为它正在寻找＆＃34;是＆＃34;？
此外，即使我输入＆＃34;是＆＃34;我觉得我的if语句出错了。我正确地得到了＃34;答案无效＆＃34;打印。
关于如何改进的任何想法？
attribute = {
"G": "Greatest",
"O": "Of",
"A": "All",
"T": "Time"
}
answer = str(raw_input("Will You Make Me Food?:"))
for answer in range(2):
if answer == "Yes":
print attribute
elif answer == "No":
print "Your the Worst"
else:
print "Invalid Answer"
答案 0 :(得分：1)
处理用户输入时。 dani@saeedi:~/Desktop/website/myweb$ rails server
/home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mysql2-0.4.5/lib/mysql2.rb:31:in `require': libmysqlclient.so.20: cannot open shared object file: No such file or directory - /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mysql2-0.4.5/lib/mysql2/mysql2.so (LoadError)
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/mysql2-0.4.5/lib/mysql2.rb:31:in `<top (required)>'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/bundler-1.15.1/lib/bundler/runtime.rb:82:in `require'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/bundler-1.15.1/lib/bundler/runtime.rb:82:in `block (2 levels) in require'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/bundler-1.15.1/lib/bundler/runtime.rb:77:in `each'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/bundler-1.15.1/lib/bundler/runtime.rb:77:in `block in require'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/bundler-1.15.1/lib/bundler/runtime.rb:66:in `each'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/bundler-1.15.1/lib/bundler/runtime.rb:66:in `require'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/bundler-1.15.1/lib/bundler.rb:108:in `require'
from /home/dani/Desktop/website/myweb/config/application.rb:7:in `<top (required)>'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/railties-5.0.2/lib/rails/commands/commands_tasks.rb:88:in `require'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/railties-5.0.2/lib/rails/commands/commands_tasks.rb:88:in `block in server'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/railties-5.0.2/lib/rails/commands/commands_tasks.rb:85:in `tap'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/railties-5.0.2/lib/rails/commands/commands_tasks.rb:85:in `server'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/railties-5.0.2/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/railties-5.0.2/lib/rails/commands.rb:18:in `<top (required)>'
from /home/dani/Desktop/website/myweb/bin/rails:9:in `require'
from /home/dani/Desktop/website/myweb/bin/rails:9:in `<top (required)>'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/spring-2.0.1/lib/spring/client/rails.rb:28:in `load'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/spring-2.0.1/lib/spring/client/rails.rb:28:in `call'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/spring-2.0.1/lib/spring/client/command.rb:7:in `call'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/spring-2.0.1/lib/spring/client.rb:30:in `run'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/spring-2.0.1/bin/spring:49:in `<top (required)>'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/spring-2.0.1/lib/spring/binstub.rb:31:in `load'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/spring-2.0.1/lib/spring/binstub.rb:31:in `<top (required)>'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/dani/.rbenv/versions/2.4.0/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/dani/Desktop/website/myweb/bin/spring:15:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'
额外的空白区域总是最好的。并且在进行字符串比较时总是将事物变为大写或大写。所以从
strip然后
answer = raw_input("Will You Make Me Food?:").strip().lower()
完成后，检查你的for循环。您正在执行上述代码两次。 if answer == "yes":
print attribute
elif answer == "no":
print "Your the Worst"
else:
print "Invalid Answer"
但您只收集一次输入。 yoyu或许意味着
for answer in range(2):附录：
关于按顺序打印for answer in range(2):
answer = raw_input("Will You Make Me Food?:").strip().lower()
if answer == "yes":
print attribute
elif answer == "no":
print "Your the Worst"
else:
print "Invalid Answer"
的问题。这是一个字典，因此不会按照您定义的顺序保存。为此，您可以使用元组
attribute答案 1 :(得分：-3)
您的代码会进行区分大小写的搜索。您可以修改它，如下所示：
for answer in range(2):
if answer == "Yes" or answer == "yes":
print attribute
elif answer == "No" or answer == "no":
print "Your the Worst"
else:
print "Invalid Answer"
或者您可以将输入读取到较低或较高的位置，并在您将其转换为相同的情况下进行搜索。
answer = str(raw_input("Will You Make Me Food?:")).lower() # or .upper()
for answer in range(2):
if answer == "yes":
print attribute
elif answer == "no":
print "Your the Worst"
else:
print "Invalid Answer"