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Make libyaml optional #304

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merged 1 commit into from
Nov 20, 2017
Merged

Make libyaml optional #304

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9 changes: 7 additions & 2 deletions openmmtools/storage/iodrivers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,11 @@
import netCDF4 as nc
from sys import getsizeof

try:
from yaml import CLoader as Loader, CDumper as Dumper
except ImportError:
from yaml import Loader, Dumper

from simtk import unit

from ..utils import typename, quantity_from_string
Expand Down Expand Up @@ -1535,7 +1540,7 @@ def storage_type(self):
# NETCDF DICT YAML HANDLERS
# =============================================================================

class _DictYamlLoader(yaml.CLoader):
class _DictYamlLoader(Loader):
"""PyYAML Loader that recognized !Quantity nodes, converts YAML output -> Python type"""
def __init__(self, *args, **kwargs):
super(_DictYamlLoader, self).__init__(*args, **kwargs)
Expand All @@ -1549,7 +1554,7 @@ def quantity_constructor(loader, node):
return data_value * data_unit


class _DictYamlDumper(yaml.CDumper):
class _DictYamlDumper(Dumper):
"""PyYAML Dumper that convert from Python -> YAML output"""
def __init__(self, *args, **kwargs):
super(_DictYamlDumper, self).__init__(*args, **kwargs)
Expand Down