10 examples of 'import string in python' in Python

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43def import_string(import_name, silent=False):
44 """Imports an object based on a string. This is useful if you want to
45 use import paths as endpoints or something similar. An import path can
46 be specified either in dotted notation (``xml.sax.saxutils.escape``)
47 or with a colon as object delimiter (``xml.sax.saxutils:escape``).
48
49 If `silent` is True the return value will be `None` if the import fails.
50
51 :param import_name: the dotted name for the object to import.
52 :param silent: if set to `True` import errors are ignored and
53 `None` is returned instead.
54 :return: imported object
55 """
56 try:
57 if ':' in import_name:
58 module, obj = import_name.split(':', 1)
59 elif '.' in import_name:
60 module, obj = import_name.rsplit('.', 1)
61 else:
62 return __import__(import_name)
63 return getattr(__import__(module, None, None, [obj]), obj)
64 except (ImportError, AttributeError):
65 if not silent:
66 raise
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90def __import__(name, globals=None, locals=None, fromlist=None):
91 """An alternative to the import function so that we can import
92 modules defined as strings.
93
94 This code was taken from: http://docs.python.org/lib/examples-imp.html
95 """
96 # Fast path: see if the module has already been imported.
97 try:
98 return sys.modules[name]
99 except KeyError:
100 pass
101
102 # If any of the following calls raises an exception,
103 # there's a problem we can't handle -- let the caller handle it.
104 module_name = name.split('.')[-1]
105 module_path = os.path.join(EXAMPLE_DIR, *name.split('.')[:-1])
106
107 fp, pathname, description = imp.find_module(module_name, [module_path])
108
109 try:
110 return imp.load_module(module_name, fp, pathname, description)
111 finally:
112 # Since we may exit via an exception, close fp explicitly.
113 if fp:
114 fp.close()
141def import_string(module_name, package=None):
142 """
143 import a module or class by string path.
144
145 :module_name: str with path of module or path to import and
146 instanciate a class
147 :returns: a module object or one instance from class if
148 module_name is a valid path to class
149
150 """
151 module, klass = module_name.rsplit(".", 1)
152 module = import_module(module, package=package)
153 obj = getattr(module, klass)
154 if ismodule(obj):
155 return obj
156 return obj()
11def import_module(name):
12 __import__("%s" % (name,), globals(), locals(), [], -1)
13 return sys.modules[name]
28def import_module(name):
29 """
30 Imports a Python module assuming that the whole *name* identifies only a
31 Python module and no symbol inside a Python module.
32 """
33
34 # fromlist must not be empty so we get the bottom-level module rather than
35 # the top-level module.
36 return __import__(name, fromlist=[''])
56def _import_module(importer, module_name, package):
57 """Import a module dynamically into a package.
58
59 :param importer: PEP302 Importer object (which knows the path to look in).
60 :param module_name: the name of the module to import.
61 :param package: the package to import the module into.
62 """
63
64 # Duplicate copies of modules are bad, so check if this has already been
65 # imported statically
66 if module_name in sys.modules:
67 return sys.modules[module_name]
68
69 loader = importer.find_module(module_name)
70 if loader is None:
71 return None
72
73 module = loader.load_module(module_name)
74
75 # Make this accessible through the parent package for static imports
76 local_name = module_name.partition(package.__name__ + '.')[2]
77 module_components = local_name.split('.')
78 parent = functools.reduce(getattr, module_components[:-1], package)
79 setattr(parent, module_components[-1], module)
80
81 return module
69def import_module(module_name):
70 '''
71 Imports the specified module by name.
72 '''
73
74 parts = module_name.split('.')
75 module = __import__(module_name)
76 for part in parts[1:]:
77 module = getattr(module, part)
78 return module
680def _import_module(module):
681 __import__(module)
682 return sys.modules[module]
35def import_module(module_name):
36 module = __import__(module_name)
37 if '.' in module_name:
38 return reduce(getattr, module_name.split('.')[1:], module)
39 return module
9def import_module(module_string):
10 return import_string(module_string)

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