@@ -142,7 +142,9 @@ def __init__(
142142 self .trace_id = trace_id or uuid .uuid4 ().hex
143143
144144 if not span_id and _span_id_generator :
145- span_id = "{:016x}" .format (int (self .trace_id , 16 ) + next (_span_id_generator ))
145+ span_id = "{:016x}" .format (
146+ int (self .trace_id , 16 ) + next (_span_id_generator )
147+ )
146148
147149 if not span_id :
148150 span_id = uuid .uuid4 ().hex [16 :]
@@ -222,7 +224,9 @@ def start_child(self, **kwargs):
222224 kwargs .setdefault ("sampled" , self .sampled )
223225
224226 rv = Span (
225- trace_id = self .trace_id , span_id = None , parent_span_id = self .span_id ,
227+ trace_id = self .trace_id ,
228+ span_id = None ,
229+ parent_span_id = self .span_id ,
226230 _span_id_generator = self ._span_id_generator ,
227231 ** kwargs
228232 )
@@ -460,7 +464,7 @@ def __init__(
460464 # next() on itertools.count() is a way to get-and-increment an integer
461465 # "atomically" on Python runtimes with a GIL
462466 if _ITERTOOLS_COUNT_IS_ATOMIC and kwargs .pop ("_fast_span_ids" , None ):
463- kwargs [' _span_id_generator' ] = itertools .count ()
467+ kwargs [" _span_id_generator" ] = itertools .count ()
464468
465469 Span .__init__ (self , ** kwargs )
466470 self .name = name
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