[英]How do I import modules when using Twisted subprocesses and virtualenvwrapper?
我試圖在Twisted中編寫一個Web服務器,它接受用戶輸入並根據輸入繪制圖像。
對於服務器,我有一個簡單的Twisted Web服務器。 為了處理圖像繪制,我使用的是python 魔杖 。 我正在使用裝有Twisted和Wand的virtualenvwrapper工作。 但是,當我運行服務器時,我收到導入錯誤:
Traceback (most recent call last):
File "insert_bubble.py", line 1, in <module>
from wand.image import Image
ImportError: No module named wand.image
如果我去python解釋器,我可以import twisted
和import wand.image
罰款。 我懷疑子流程沒有使用正確的環境。 解決方法是將子進程使用的所有模塊安裝到我的用戶帳戶,但我想避免這種情況。
服務器代碼主要來自Twisted教程頁面。
import sys
from twisted.internet import protocol
from twisted.internet import reactor
import re
class MyPP(protocol.ProcessProtocol):
def __init__(self, verses):
self.verses = verses
self.data = ""
def connectionMade(self):
print "connectionMade!"
self.transport.closeStdin() # tell them we're done
def outReceived(self, data):
print "outReceived! with %d bytes!" % len(data)
self.data = self.data + data
def errReceived(self, data):
print "errReceived! with %d bytes!" % len(data)
self.data= self.data+data
def inConnectionLost(self):
print "inConnectionLost! stdin is closed! (we probably did it)"
def outConnectionLost(self):
print "outConnectionLost! The child closed their stdout!"
# now is the time to examine what they wrote
print "I saw them write:", self.data
#(dummy, lines, words, chars, file) = re.split(r'\s+', self.data)
#print "I saw %s lines" % lines
def errConnectionLost(self):
print "errConnectionLost! The child closed their stderr."
def processExited(self, reason):
print "processExited, status %d" % (reason.value.exitCode,)
def processEnded(self, reason):
print "processEnded, status %d" % (reason.value.exitCode,)
print "quitting"
reactor.stop()
pp = MyPP(10)
reactor.spawnProcess(pp, sys.executable, ['python', 'insert_bubble.py'], {})
reactor.run()
如何讓子進程使用正確的virtualenv Python安裝,而不是我的家庭環境?
而不是像這樣運行子進程:
reactor.spawnProcess(
pp, sys.executable, ['python', 'insert_bubble.py'], {}
)
像這樣運行:
reactor.spawnProcess(
pp, sys.executable, ['python', 'insert_bubble.py'], os.environ
)
這會將父進程環境復制到子進程中,而不是使用空環境啟動子進程。
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