Oh, the many, many ways...
String concatenation:
plot.savefig('hanning' + str(num) + '.pdf')
Conversion Specifier:
plot.savefig('hanning%s.pdf' % num)
Using local variable names:
plot.savefig('hanning%(num)s.pdf' % locals()) # Neat trick
Using str.format()
:
plot.savefig('hanning{0}.pdf'.format(num)) # Note: This is the new preferred way
Using f-strings:
plot.savefig(f'hanning{num}.pdf') # added in Python 3.6
Using string.Template
:
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