"Lisi" <lisi.re...@gmail.com> wrote
But I still can't write to the file.
If I do:
target.write(line1)
The value of the variable line1 is written to the file.
That will work provided line1 is a string.
But if I put the three variables into the write command,
what gets printed is the name of the variables, not their values.
At the moment it is:
target.write("""
line1
line2
line3
""")
This is not three variables it is a single string value that
coincidentally has the names of three of your variables
inside it. But Python has no way to guess that.
You need to be clear on the different between a variable:
a name that references a value(or object if you prefer)
and a string which is a type of value(a string object)
In the first case you pass a name (line1) in the second
you pass a value (the string literal)
I am beginning to feel paranoid! I simply can't see in what way
that differs
from yours.
quote signs
I have, I hope, finally _fully_ taken in that many commands need ().
Actually commands do not usually need (), it is functions and methods
that need (). They are different.
print is a command and it does not need () - in Python 2 at least!
print 1,2,"some words"
But file.write() is a method of the file object and must have
parentheses.
f.write("some words")
The () are an instruction to execute the function. Without
the () Python treats the function as an object in its own right:
list_of_objects = [1,"a string",f.write]
for obj in list_of_objects:
print "Object is: ", obj
it is possible to get a new line just by giving a new line - without
the
explicit instruction.
That is the unique selling point of triple quoted strings,
you can embed newlines inside them. This makes them
most useful for docstrings (which decribe what a function
is for):
def myFunc():
""""myFunc() -> None
Does some useful background processing with no obvious impact on
data.
"""
theAnswer = 7*6
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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