how to write integer in python

How to write integer values to a file using out.write()?

stackoverflow.com › questions › 11160939 › how-to-write-integer-values-to-a-file-using-out-write

write() only takes a single string argument, so you could do this:

outf.write(str(num))

outf.write('{}'.format(num))  # more "modern"
outf.write('%d' % num)        # deprecated mostly

Also note that write will not append a newline to your output so if you need it you'll have to supply it yourself.

Aside:

Using string formatting would give you more control over your output, so for instance you could write (both of these are equivalent):

num = 7
outf.write('{:03d}\n'.format(num))

num = 12
outf.write('%03d\n' % num)

to get three spaces, with leading zeros for your integer value followed by a newline:

007
012

format() will be around for a long while, so it's worth learning/knowing.

Answer from Levon on Stack Overflow

W3Schools

w3schools.com › python › python_numbers.asp

Python Numbers

Int, or integer, is a whole number, positive or negative, without decimals, of unlimited length. ... x = 1 y = 35656222554887711 z = -3255522 print(type(x)) print(type(y)) print(type(z)) Try it Yourself » · Float, or "floating point number" ...

Programiz

programiz.com › python-programming › methods › built-in › int

Python int() (With Examples)

Become a certified Python programmer. Try Programiz PRO! ... The int() function converts a number or a string to its equivalent integer.

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Method 1 Use a list. A list is a data type that collects together other objects in a sequence. Each item is assigned an index indicating its location: the first item is at index 0, the second at index 1, etc. colors = ["black", "red", "blue", "white"] # accessing a color from a number print(colors[0]) # prints "black" # accessing a number from a color print(colors.index("black")) # prints 0 Method 2 Use a dictionary. A dictionary is a data type made up of key-value pairs. You access the values through the keys. For example, colors = {"black": 0, "red": 1, "blue": 2, "white": 3} # accessing a number from a color print(colors["black"]) # prints 0 Now, one problem with dictionaries is that they're good at looking up values from keys but not the other way around. You can do it, though -- one way would be like this: # accessing a color from a number for color, index in colors.items(): if index == 0: break print(color) # prints "black" Method 3 This one may be a little complicated for someone on their first day (and I really just mention it for fun), but you could use a list of named tuples. A named tuple is like a regular tuple except that you assign names to each of the positions in addition to indices. Note that you have to import namedtuple from the collections module and you have to set up the named tuple template before you can use it. from collections import namedtuple Color = namedtuple("Color", ["color", "number"]) colors = [Color("black", 0), Color("red", 1), Color("blue", 2), Color("white", 3)] # accessing a color from an index for color in colors: if color.number == 0: break print(color.color) # prints "black" # accessing a number from a color for color in colors: if color.color == "black": break print(color.number) # prints 0 This might look the most complicated (and it is), but it's also the most flexible of the options and the most symmetric in terms of treating the number and color name on equal footing. That said, named tuples are still tuples and thus you can use an index if you like. So this would actually be the faster way of getting the color from the number. print(color[0]) # prints "black" More on reddit.com

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