def first_index_gt(data_list, value):
'''return the first index greater than value from a given list like object'''
try:
index = next(data[0] for data in enumerate(data_list) if data[1] > value)
return index
except StopIteration: return - 1
def first_index_lt(data_list, value):
'''return the first index less than value from a given list like object'''
try:
index = next(data[0] for data in enumerate(data_list) if data[1] < value)
return index
except StopIteration: return - 1
def first_index_ne(data_list, value):
'''returns first index not equal to the value from list'''
try:
index = next(data[0] for data in enumerate(data_list) if data[1] != value)
return index
except StopIteration: return - 1
def first_index_et(data_list, value):
'''same as data_list.index(value), except with exception handling
Also finds 'nan' values'''
try:
if type(value) == float and math.isnan(value):
return next(data[0] for data in enumerate(data_list)
if (type(data[1]) in (float, np.float64, np.float32, np.float96)
and math.isnan(data[1])))
else:
return next(data[0] for data in enumerate(data_list) if data[1] == value)
except (ValueError, StopIteration): return - 1
Diff to Previous Revision
--- revision 1 2012-03-13 16:18:11
+++ revision 2 2012-03-13 16:21:36
@@ -20,8 +20,13 @@
except StopIteration: return - 1
def first_index_et(data_list, value):
- '''same as data_list.index(value), except with exception handling'''
+ '''same as data_list.index(value), except with exception handling
+ Also finds 'nan' values'''
try:
- index = next(data[0] for data in enumerate(data_list) if data[1] == value)
- return index
- except ValueError: return - 1
+ if type(value) == float and math.isnan(value):
+ return next(data[0] for data in enumerate(data_list)
+ if (type(data[1]) in (float, np.float64, np.float32, np.float96)
+ and math.isnan(data[1])))
+ else:
+ return next(data[0] for data in enumerate(data_list) if data[1] == value)
+ except (ValueError, StopIteration): return - 1
