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Created July 26, 2021 06:47
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Python Sequence Join Format String Wrapper
class J:
"""
Sequence Join Format String Wrapper
>>> seq = ['a', 'b', 1, None]
>>> print(f"default: {J(seq)}"
default: 1,b,1,None
>>> print(f"custom-delimeter: {J(seq):/-}"
custom-delimiter: a/-b/-1/-None
"""
def __init__(self, seq):
self.seq = seq
def __format__(self, format_spec=','):
# format_spec is the delimiter to use
if self.seq:
return format_spec.join(str(item) for item in self.seq)
else:
return ''
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