First commit

author: Shubham Saini <shubham6405@gmail.com> 2018-12-11 10:01:23 +0000
committer: Shubham Saini <shubham6405@gmail.com> 2018-12-11 10:01:23 +0000
commit: 68df54d6629ec019142eb149dd037774f2d11e7c (patch)
tree: 345bc22d46b4e01a4ba8303b94278952a4ed2b9e /venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/retrying.py
1 files changed, 267 insertions, 0 deletions
diff --git a/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/retrying.py b/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/retrying.py
new file mode 100644
index 0000000..f8d743b
--- /dev/null
+++ b/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/retrying.py
@@ -0,0 +1,267 @@
+## Copyright 2013-2014 Ray Holder
+##
+## Licensed under the Apache License, Version 2.0 (the "License");
+## you may not use this file except in compliance with the License.
+## You may obtain a copy of the License at
+##
+## http://www.apache.org/licenses/LICENSE-2.0
+##
+## Unless required by applicable law or agreed to in writing, software
+## distributed under the License is distributed on an "AS IS" BASIS,
+## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+## See the License for the specific language governing permissions and
+## limitations under the License.
+import random
+from pip._vendor import six
+import sys
+import time
+import traceback
+# sys.maxint / 2, since Python 3.2 doesn't have a sys.maxint...
+MAX_WAIT = 1073741823
+def retry(*dargs, **dkw):
+    """
+    Decorator function that instantiates the Retrying object
+    @param *dargs: positional arguments passed to Retrying object
+    @param **dkw: keyword arguments passed to the Retrying object
+    """
+    # support both @retry and @retry() as valid syntax
+    if len(dargs) == 1 and callable(dargs[0]):
+        def wrap_simple(f):
+            @six.wraps(f)
+            def wrapped_f(*args, **kw):
+                return Retrying().call(f, *args, **kw)
+            return wrapped_f
+        return wrap_simple(dargs[0])
+    else:
+        def wrap(f):
+            @six.wraps(f)
+            def wrapped_f(*args, **kw):
+                return Retrying(*dargs, **dkw).call(f, *args, **kw)
+            return wrapped_f
+        return wrap
+class Retrying(object):
+    def __init__(self,
+                 stop=None, wait=None,
+                 stop_max_attempt_number=None,
+                 stop_max_delay=None,
+                 wait_fixed=None,
+                 wait_random_min=None, wait_random_max=None,
+                 wait_incrementing_start=None, wait_incrementing_increment=None,
+                 wait_exponential_multiplier=None, wait_exponential_max=None,
+                 retry_on_exception=None,
+                 retry_on_result=None,
+                 wrap_exception=False,
+                 stop_func=None,
+                 wait_func=None,
+                 wait_jitter_max=None):
+        self._stop_max_attempt_number = 5 if stop_max_attempt_number is None else stop_max_attempt_number
+        self._stop_max_delay = 100 if stop_max_delay is None else stop_max_delay
+        self._wait_fixed = 1000 if wait_fixed is None else wait_fixed
+        self._wait_random_min = 0 if wait_random_min is None else wait_random_min
+        self._wait_random_max = 1000 if wait_random_max is None else wait_random_max
+        self._wait_incrementing_start = 0 if wait_incrementing_start is None else wait_incrementing_start
+        self._wait_incrementing_increment = 100 if wait_incrementing_increment is None else wait_incrementing_increment
+        self._wait_exponential_multiplier = 1 if wait_exponential_multiplier is None else wait_exponential_multiplier
+        self._wait_exponential_max = MAX_WAIT if wait_exponential_max is None else wait_exponential_max
+        self._wait_jitter_max = 0 if wait_jitter_max is None else wait_jitter_max
+        # TODO add chaining of stop behaviors
+        # stop behavior
+        stop_funcs = []
+        if stop_max_attempt_number is not None:
+            stop_funcs.append(self.stop_after_attempt)
+        if stop_max_delay is not None:
+            stop_funcs.append(self.stop_after_delay)
+        if stop_func is not None:
+            self.stop = stop_func
+        elif stop is None:
+            self.stop = lambda attempts, delay: any(f(attempts, delay) for f in stop_funcs)
+        else:
+            self.stop = getattr(self, stop)
+        # TODO add chaining of wait behaviors
+        # wait behavior
+        wait_funcs = [lambda *args, **kwargs: 0]
+        if wait_fixed is not None:
+            wait_funcs.append(self.fixed_sleep)
+        if wait_random_min is not None or wait_random_max is not None:
+            wait_funcs.append(self.random_sleep)
+        if wait_incrementing_start is not None or wait_incrementing_increment is not None:
+            wait_funcs.append(self.incrementing_sleep)
+        if wait_exponential_multiplier is not None or wait_exponential_max is not None:
+            wait_funcs.append(self.exponential_sleep)
+        if wait_func is not None:
+            self.wait = wait_func
+        elif wait is None:
+            self.wait = lambda attempts, delay: max(f(attempts, delay) for f in wait_funcs)
+        else:
+            self.wait = getattr(self, wait)
+        # retry on exception filter
+        if retry_on_exception is None:
+            self._retry_on_exception = self.always_reject
+        else:
+            self._retry_on_exception = retry_on_exception
+        # TODO simplify retrying by Exception types
+        # retry on result filter
+        if retry_on_result is None:
+            self._retry_on_result = self.never_reject
+        else:
+            self._retry_on_result = retry_on_result
+        self._wrap_exception = wrap_exception
+    def stop_after_attempt(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Stop after the previous attempt >= stop_max_attempt_number."""
+        return previous_attempt_number >= self._stop_max_attempt_number
+    def stop_after_delay(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Stop after the time from the first attempt >= stop_max_delay."""
+        return delay_since_first_attempt_ms >= self._stop_max_delay
+    def no_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Don't sleep at all before retrying."""
+        return 0
+    def fixed_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Sleep a fixed amount of time between each retry."""
+        return self._wait_fixed
+    def random_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Sleep a random amount of time between wait_random_min and wait_random_max"""
+        return random.randint(self._wait_random_min, self._wait_random_max)
+    def incrementing_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """
+        Sleep an incremental amount of time after each attempt, starting at
+        wait_incrementing_start and incrementing by wait_incrementing_increment
+        """
+        result = self._wait_incrementing_start + (self._wait_incrementing_increment * (previous_attempt_number - 1))
+        if result < 0:
+            result = 0
+        return result
+    def exponential_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        exp = 2 ** previous_attempt_number
+        result = self._wait_exponential_multiplier * exp
+        if result > self._wait_exponential_max:
+            result = self._wait_exponential_max
+        if result < 0:
+            result = 0
+        return result
+    def never_reject(self, result):
+        return False
+    def always_reject(self, result):
+        return True
+    def should_reject(self, attempt):
+        reject = False
+        if attempt.has_exception:
+            reject |= self._retry_on_exception(attempt.value[1])
+        else:
+            reject |= self._retry_on_result(attempt.value)
+        return reject
+    def call(self, fn, *args, **kwargs):
+        start_time = int(round(time.time() * 1000))
+        attempt_number = 1
+        while True:
+            try:
+                attempt = Attempt(fn(*args, **kwargs), attempt_number, False)
+            except:
+                tb = sys.exc_info()
+                attempt = Attempt(tb, attempt_number, True)
+            if not self.should_reject(attempt):
+                return attempt.get(self._wrap_exception)
+            delay_since_first_attempt_ms = int(round(time.time() * 1000)) - start_time
+            if self.stop(attempt_number, delay_since_first_attempt_ms):
+                if not self._wrap_exception and attempt.has_exception:
+                    # get() on an attempt with an exception should cause it to be raised, but raise just in case
+                    raise attempt.get()
+                else:
+                    raise RetryError(attempt)
+            else:
+                sleep = self.wait(attempt_number, delay_since_first_attempt_ms)
+                if self._wait_jitter_max:
+                    jitter = random.random() * self._wait_jitter_max
+                    sleep = sleep + max(0, jitter)
+                time.sleep(sleep / 1000.0)
+            attempt_number += 1
+class Attempt(object):
+    """
+    An Attempt encapsulates a call to a target function that may end as a
+    normal return value from the function or an Exception depending on what
+    occurred during the execution.
+    """
+    def __init__(self, value, attempt_number, has_exception):
+        self.value = value
+        self.attempt_number = attempt_number
+        self.has_exception = has_exception
+    def get(self, wrap_exception=False):
+        """
+        Return the return value of this Attempt instance or raise an Exception.
+        If wrap_exception is true, this Attempt is wrapped inside of a
+        RetryError before being raised.
+        """
+        if self.has_exception:
+            if wrap_exception:
+                raise RetryError(self)
+            else:
+                six.reraise(self.value[0], self.value[1], self.value[2])
+        else:
+            return self.value
+    def __repr__(self):
+        if self.has_exception:
+            return "Attempts: {0}, Error:\n{1}".format(self.attempt_number, "".join(traceback.format_tb(self.value[2])))
+        else:
+            return "Attempts: {0}, Value: {1}".format(self.attempt_number, self.value)
+class RetryError(Exception):
+    """
+    A RetryError encapsulates the last Attempt instance right before giving up.
+    """
+    def __init__(self, last_attempt):
+        self.last_attempt = last_attempt
+    def __str__(self):
+        return "RetryError[{0}]".format(self.last_attempt)
author	Shubham Saini <shubham6405@gmail.com>	2018-12-11 10:01:23 +0000
committer	Shubham Saini <shubham6405@gmail.com>	2018-12-11 10:01:23 +0000
commit	68df54d6629ec019142eb149dd037774f2d11e7c (patch)
tree	345bc22d46b4e01a4ba8303b94278952a4ed2b9e /venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/retrying.py

diff --git a/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/retrying.py b/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/retrying.py new file mode 100644 index 0000000..f8d743b --- /dev/null +++ b/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/retrying.py
@@ -0,0 +1,267 @@
	1	## Copyright 2013-2014 Ray Holder
	2	##
	3	## Licensed under the Apache License, Version 2.0 (the "License");
	4	## you may not use this file except in compliance with the License.
	5	## You may obtain a copy of the License at
	6	##
	7	## http://www.apache.org/licenses/LICENSE-2.0
	8	##
	9	## Unless required by applicable law or agreed to in writing, software
	10	## distributed under the License is distributed on an "AS IS" BASIS,
	11	## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	12	## See the License for the specific language governing permissions and
	13	## limitations under the License.
	14
	15	import random
	16	from pip._vendor import six
	17	import sys
	18	import time
	19	import traceback
	20
	21
	22	# sys.maxint / 2, since Python 3.2 doesn't have a sys.maxint...
	23	MAX_WAIT = 1073741823
	24
	25
	26	def retry(dargs, *dkw):
	27	"""
	28	Decorator function that instantiates the Retrying object
	29	@param *dargs: positional arguments passed to Retrying object
	30	@param **dkw: keyword arguments passed to the Retrying object
	31	"""
	32	# support both @retry and @retry() as valid syntax
	33	if len(dargs) == 1 and callable(dargs[0]):
	34	def wrap_simple(f):
	35
	36	@six.wraps(f)
	37	def wrapped_f(args, *kw):
	38	return Retrying().call(f, args, *kw)
	39
	40	return wrapped_f
	41
	42	return wrap_simple(dargs[0])
	43
	44	else:
	45	def wrap(f):
	46
	47	@six.wraps(f)
	48	def wrapped_f(args, *kw):
	49	return Retrying(dargs, dkw).call(f, args, **kw)
	50
	51	return wrapped_f
	52
	53	return wrap
	54
	55
	56	class Retrying(object):
	57
	58	def __init__(self,
	59	stop=None, wait=None,
	60	stop_max_attempt_number=None,
	61	stop_max_delay=None,
	62	wait_fixed=None,
	63	wait_random_min=None, wait_random_max=None,
	64	wait_incrementing_start=None, wait_incrementing_increment=None,
	65	wait_exponential_multiplier=None, wait_exponential_max=None,
	66	retry_on_exception=None,
	67	retry_on_result=None,
	68	wrap_exception=False,
	69	stop_func=None,
	70	wait_func=None,
	71	wait_jitter_max=None):
	72
	73	self._stop_max_attempt_number = 5 if stop_max_attempt_number is None else stop_max_attempt_number
	74	self._stop_max_delay = 100 if stop_max_delay is None else stop_max_delay
	75	self._wait_fixed = 1000 if wait_fixed is None else wait_fixed
	76	self._wait_random_min = 0 if wait_random_min is None else wait_random_min
	77	self._wait_random_max = 1000 if wait_random_max is None else wait_random_max
	78	self._wait_incrementing_start = 0 if wait_incrementing_start is None else wait_incrementing_start
	79	self._wait_incrementing_increment = 100 if wait_incrementing_increment is None else wait_incrementing_increment
	80	self._wait_exponential_multiplier = 1 if wait_exponential_multiplier is None else wait_exponential_multiplier
	81	self._wait_exponential_max = MAX_WAIT if wait_exponential_max is None else wait_exponential_max
	82	self._wait_jitter_max = 0 if wait_jitter_max is None else wait_jitter_max
	83
	84	# TODO add chaining of stop behaviors
	85	# stop behavior
	86	stop_funcs = []
	87	if stop_max_attempt_number is not None:
	88	stop_funcs.append(self.stop_after_attempt)
	89
	90	if stop_max_delay is not None:
	91	stop_funcs.append(self.stop_after_delay)
	92
	93	if stop_func is not None:
	94	self.stop = stop_func
	95
	96	elif stop is None:
	97	self.stop = lambda attempts, delay: any(f(attempts, delay) for f in stop_funcs)
	98
	99	else:
	100	self.stop = getattr(self, stop)
	101
	102	# TODO add chaining of wait behaviors
	103	# wait behavior
	104	wait_funcs = [lambda args, *kwargs: 0]
	105	if wait_fixed is not None:
	106	wait_funcs.append(self.fixed_sleep)
	107
	108	if wait_random_min is not None or wait_random_max is not None:
	109	wait_funcs.append(self.random_sleep)
	110
	111	if wait_incrementing_start is not None or wait_incrementing_increment is not None:
	112	wait_funcs.append(self.incrementing_sleep)
	113
	114	if wait_exponential_multiplier is not None or wait_exponential_max is not None:
	115	wait_funcs.append(self.exponential_sleep)
	116
	117	if wait_func is not None:
	118	self.wait = wait_func
	119
	120	elif wait is None:
	121	self.wait = lambda attempts, delay: max(f(attempts, delay) for f in wait_funcs)
	122
	123	else:
	124	self.wait = getattr(self, wait)
	125
	126	# retry on exception filter
	127	if retry_on_exception is None:
	128	self._retry_on_exception = self.always_reject
	129	else:
	130	self._retry_on_exception = retry_on_exception
	131
	132	# TODO simplify retrying by Exception types
	133	# retry on result filter
	134	if retry_on_result is None:
	135	self._retry_on_result = self.never_reject
	136	else:
	137	self._retry_on_result = retry_on_result
	138
	139	self._wrap_exception = wrap_exception
	140
	141	def stop_after_attempt(self, previous_attempt_number, delay_since_first_attempt_ms):
	142	"""Stop after the previous attempt >= stop_max_attempt_number."""
	143	return previous_attempt_number >= self._stop_max_attempt_number
	144
	145	def stop_after_delay(self, previous_attempt_number, delay_since_first_attempt_ms):
	146	"""Stop after the time from the first attempt >= stop_max_delay."""
	147	return delay_since_first_attempt_ms >= self._stop_max_delay
	148
	149	def no_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
	150	"""Don't sleep at all before retrying."""
	151	return 0
	152
	153	def fixed_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
	154	"""Sleep a fixed amount of time between each retry."""
	155	return self._wait_fixed
	156
	157	def random_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
	158	"""Sleep a random amount of time between wait_random_min and wait_random_max"""
	159	return random.randint(self._wait_random_min, self._wait_random_max)
	160
	161	def incrementing_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
	162	"""
	163	Sleep an incremental amount of time after each attempt, starting at
	164	wait_incrementing_start and incrementing by wait_incrementing_increment
	165	"""
	166	result = self._wait_incrementing_start + (self._wait_incrementing_increment * (previous_attempt_number - 1))
	167	if result < 0:
	168	result = 0
	169	return result
	170
	171	def exponential_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
	172	exp = 2 ** previous_attempt_number
	173	result = self._wait_exponential_multiplier * exp
	174	if result > self._wait_exponential_max:
	175	result = self._wait_exponential_max
	176	if result < 0:
	177	result = 0
	178	return result
	179
	180	def never_reject(self, result):
	181	return False
	182
	183	def always_reject(self, result):
	184	return True
	185
	186	def should_reject(self, attempt):
	187	reject = False
	188	if attempt.has_exception:
	189	reject \|= self._retry_on_exception(attempt.value[1])
	190	else:
	191	reject \|= self._retry_on_result(attempt.value)
	192
	193	return reject
	194
	195	def call(self, fn, args, *kwargs):
	196	start_time = int(round(time.time() * 1000))
	197	attempt_number = 1
	198	while True:
	199	try:
	200	attempt = Attempt(fn(args, *kwargs), attempt_number, False)
	201	except:
	202	tb = sys.exc_info()
	203	attempt = Attempt(tb, attempt_number, True)
	204
	205	if not self.should_reject(attempt):
	206	return attempt.get(self._wrap_exception)
	207
	208	delay_since_first_attempt_ms = int(round(time.time() * 1000)) - start_time
	209	if self.stop(attempt_number, delay_since_first_attempt_ms):
	210	if not self._wrap_exception and attempt.has_exception:
	211	# get() on an attempt with an exception should cause it to be raised, but raise just in case
	212	raise attempt.get()
	213	else:
	214	raise RetryError(attempt)
	215	else:
	216	sleep = self.wait(attempt_number, delay_since_first_attempt_ms)
	217	if self._wait_jitter_max:
	218	jitter = random.random() * self._wait_jitter_max
	219	sleep = sleep + max(0, jitter)
	220	time.sleep(sleep / 1000.0)
	221
	222	attempt_number += 1
	223
	224
	225	class Attempt(object):
	226	"""
	227	An Attempt encapsulates a call to a target function that may end as a
	228	normal return value from the function or an Exception depending on what
	229	occurred during the execution.
	230	"""
	231
	232	def __init__(self, value, attempt_number, has_exception):
	233	self.value = value
	234	self.attempt_number = attempt_number
	235	self.has_exception = has_exception
	236
	237	def get(self, wrap_exception=False):
	238	"""
	239	Return the return value of this Attempt instance or raise an Exception.
	240	If wrap_exception is true, this Attempt is wrapped inside of a
	241	RetryError before being raised.
	242	"""
	243	if self.has_exception:
	244	if wrap_exception:
	245	raise RetryError(self)
	246	else:
	247	six.reraise(self.value[0], self.value[1], self.value[2])
	248	else:
	249	return self.value
	250
	251	def __repr__(self):
	252	if self.has_exception:
	253	return "Attempts: {0}, Error:\n{1}".format(self.attempt_number, "".join(traceback.format_tb(self.value[2])))
	254	else:
	255	return "Attempts: {0}, Value: {1}".format(self.attempt_number, self.value)
	256
	257
	258	class RetryError(Exception):
	259	"""
	260	A RetryError encapsulates the last Attempt instance right before giving up.
	261	"""
	262
	263	def __init__(self, last_attempt):
	264	self.last_attempt = last_attempt
	265
	266	def __str__(self):
	267	return "RetryError[{0}]".format(self.last_attempt)