TypeError: 'float' object is not iterable

[Ana Dionísio]

Hi!!

I keep having this error and I don't know why: TypeError: 'float' object is not iterable.

I have this piece of code, that imports to python some data from Excel and saves it in a list:

"
t_amb = []

for i in range(sh2.nrows):
    t_amb.append(sh2.cell(i,2).value)

print t_amb

"
Here is everything ok.

But then, I need to pass the data again to exel, so I wrote this:

"
a=8
for b in range (len(t_amb)):
    a=8
    for d in t_amb[b]:
        a=a+1
        sheet.write(a,b+1,d)
"

The error appear in "for d in t_amb[b]:" and I don't understand why. Can you help me?