how to write contents into a file in python where one part holds a variable and other just a display statement?

Question

How do I use a write() in Python to write a statement like "value of a is:",a?

We use

print "value of a is:",a

but

f.write("value of a is:",a)

gives an error. How do I write it into a file??

What have **you** tried so far? – A.J. Uppal May 26 '14 at 11:05 — A.J. Uppal, May 26 '14 at 11:05
Doesn't the question state what he tried? – Hans Then May 26 '14 at 11:06 — Hans Then, May 26 '14 at 11:06
@charvi try: `print >>f, "value of a is:", a` – Hans Then May 26 '14 at 11:06 — Hans Then, May 26 '14 at 11:06

score 2 · Answer 1 · answered May 26 '14 at 11:08

2

I guess this is what you are after:

with open('somefile.txt', 'w') as the_file:
    the_file.write("value of a is: {}\n".format(a))

answered May 26 '14 at 11:08

Marcin

score 2 · Accepted Answer · edited May 23 '17 at 12:20

2

If a is an integer:

f.write("value of a is: %d" % (a))

If you're looking for a more robust solution, see: Python string formatting: % vs. .format

edited May 23 '17 at 12:20

Community

answered May 26 '14 at 11:13

yossim

score 1 · Answer 3 · answered May 26 '14 at 11:25

1

I guess your are look at for these codes:

a=10
f=open("test.dat","w")
f.write('valiue is a is:'+str(a))
f.close()

Because f.write() expected a character buffer object, you have to convert a in to string to write to your file

answered May 26 '14 at 11:25

qzzeng

score 0 · Answer 4 · answered May 26 '14 at 11:11

0

.write() takes a complete string, not one of the following format:

"value of a is:",a

Instead of calling f.write("value of a is:",a), assign "value of a is:",a to a variable first:

string = "value of a is:", a
f.write(string)

answered May 26 '14 at 11:11

A.J. Uppal

4 Answers4