Python TypeError：“ bool”对象不可迭代

Question

I'm running this code in an attempt to assign key value pairs using a dict. to store the data (key = xvalue, yvalue) which is in two separate arrays. ie

1  def main():
2  path = 'some/path/'
3
4
5   d = {}
6   xcord = [1.2,2.4,2.9,3.0,4.1]
7   ycord = [1.0,2.0,3.0,4.0,5.0]
8   a=0
9   b=0
10  while b < 136 and a <= 21 :
11      for x in xcord and y in ycord :
12  -->    d{b}.append(xcord[x],ycord[y])
13         b=b+1
14         if a == 21:
15          a=0
16         else:
17          a=a+1
18  print(d)
19
20  if __name__ == "__main__":
21     main()

But when I run this I get a TypeError:

File "some/path/", line 21, in <module>
    main()
  File "some/path", line 12, in main
    for x in xcord and y in ycord :
TypeError: 'bool' object is not iterable

I'm looking to append data from the xcord and ycord arrays to the dictionary and I'm clearly not doing this correctly.
I was thinking I could reference the dict for future calculations like this for example:

print(d{0})
# with a result
{1.2 , 1.0}
#   or  say I want to calculate slop between two points
sqrt((d{0, [1],[]} - d{2, [1],[]})sqrd + (d{0, [],[1]} - d{2, [], [1]})sqrd)
# with a result 
3.2

Please critique me on the Pythonic ways, I am new to Python. and any help is appreciated. I know the math portion is not correct as I was just show some syntax to help explain

Answer 1

Replace:

for x in xcord and y in ycord :

With:

for x,y in zip(xcord,ycord):

And lot more mistakes, so your code should be like this:

def main():
    path = 'some/path/'
    d = {}
    xcord = [1.2,2.4,2.9,3.0,4.1]
    ycord = [1.0,2.0,3.0,4.0,5.0]
    a=0
    b=0
    while b < 136 and a <= 21 :
        for x,y in zip(xcord,ycord):
           if b in d:
              d[b].append(x,y)
           else:
              d[b]=[x,y]
           b=b+1
           if a == 21:
              a=0
           else:
              a=a+1
    print(d)

if __name__ == "__main__":
   main()

Answer 2

Thanks to everyone for the support in my early python coding days.
The solution I found to work with what exactly I was expecting for the output was:

d = {}
b = 0
xcord = [1.2,2.4,2.9,3.0,4.1]
ycord = [1.0,2.0,3.0,4.0,5.0]

    for x,y in zip(xcord,ycord):
        if b in d:
            d[b].append(x,y)
        else:
            d[b] = [x,y]
        b=b+1