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import platform
import sys
import cssselect
import lxml.etree
import parsel
import twisted
import w3lib
import scrapy
def scrapy_components_versions():
lxml_version = ".".join(map(str, lxml.etree.LXML_VERSION))
libxml2_version = ".".join(map(str, lxml.etree.LIBXML_VERSION))
try:
w3lib_version = w3lib.__version__
except AttributeError:
w3lib_version = "<1.14.3"
try:
import cryptography
cryptography_version = cryptography.__version__
except ImportError:
cryptography_version = "unknown"
return [
("Scrapy", scrapy.__version__),
("lxml", lxml_version),
("libxml2", libxml2_version),
("cssselect", cssselect.__version__),
("parsel", parsel.__version__),
("w3lib", w3lib_version),
("Twisted", twisted.version.short()),
("Python", sys.version.replace("\n", "- ")),
("pyOpenSSL", _get_openssl_version()),
("cryptography", cryptography_version),
("Platform", platform.platform()),
]
def _get_openssl_version():
try:
import OpenSSL
openssl = OpenSSL.SSL.SSLeay_version(OpenSSL.SSL.SSLEAY_VERSION)\
.decode('ascii', errors='replace')
# pyOpenSSL 0.12 does not expose openssl version
except AttributeError:
openssl = 'Unknown OpenSSL version'
return '{} ({})'.format(OpenSSL.version.__version__, openssl)
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