I am trying to write multiple variables in one file. And would like to avoid to write all the variables and their type seperately.
I created the varibales with:
for i in range(100):
globals()['doc%s' %i] = 5.*i
to write it to the file:
df = open("test.csv")
df.write("%0.10.f;%0.10.f" % (doc1, doc2))
But i would like to avoid to write within the last line all 100 names with the types.
Is this possible? Does anyone have an idea? Thank you!
Your problem is that you are dynamically creating variables in the first place. There is really never a good reason to do this. Just create a single doc dict, and then you can write that out to the file.
You shouldn't use 100 variables for this. Instead, use a list with 100 values in it. Then you can simply iterate over the list (or pairs of values from the list) and write the values out as you go.
doc = [5.*i for i in range(100)]
pairs = zip(*[iter(doc)]*2)
with open("test.csv") as df:
for a, b in pairs:
df.write("{0.10f};{0.10f}\n".format(a, b))
If you must generate your variables in such a way, you can use a similar globals for-loop to dynamically retrieve the variables again.
For example:
data = [globals()['doc%s' % i] for i in range(100)]
puts the variables (doc0 ... doc99) into a list named data. You can then manipulate the list to print it in a format you want.
formatted_data = ["%0.10f" % point for point in data]
df = open("test.csv", "wb")
df.write(";".join(formatted_data))
df.close()
use eval()
for i in range(100):
globals()['doc%s' % i] = 5. * i
df = open("test.csv", mode='w')
for i in range(100):
df.write("%0.10f;" % eval('doc%s' % i))
try it yourself. (My python version 2.7.8)
