I am an experienced c
programmer trying to come to terms with Python
.
location
is tuple
and I can print with the following
print(" %s %s" % (date_time, model))
print("Lat: %-.4f, Lon: %-.4f" % (location))
I tried to combine this into a single print, but get error TypeError: must be real number, not tuple
with the following
print("%s %s Lat: %-.4f, Lon: %-.4f" % (date_time, model, location))
I have tried several variations, without success.
I can think of several ways of working around this (which I would do if I had to deliver a working program) but would like to understand an elegant method an experienced Python programmer would use.
Unpack your tuple.
>>> date_time, model, location = 1, 2, (3, 4)
>>> print("%s %s Lat: %-.4f, Lon: %-.4f" % (date_time, model, *location))
1 2 Lat: 3.0000, Lon: 4.0000
pyformat.info is a helpful site that summarizes string formatting in Python.
In general, I suggest the usage of the new-style str.format
over the %
operator. Here's the relevant PEP.
You want to print the values in the tuple, not the tuple itself. Either concatenate the tuple:
print("%s %s Lat: %-.4f, Lon: %-.4f" % ((date_time, model) + location)))
or interpolate the tuple values into the first tuple:
print("%s %s Lat: %-.4f, Lon: %-.4f" % (date_time, model, *location))
Personally, I'd not use printf formatting here at all . Use the more modern and powerful string formatting syntax , preferably in the form of the (very fast) formatted string literals :
print(f"{date_time} {model} Lat: {location[0]:-.4f}, Lon: {location[1]:-.4f}")
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