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[英]Skip saving row if slug already exists in postgresql database - python
[英]Python skip a function if the file already exists
我需要在python中创建一个skip函数,如果该文件已经存在,它将跳过我的下载代码。
函数的工作方式:(如果文件存在,则无需运行此代码,只需跳至下一个代码。如果文件不存在,则运行此代码,然后运行下一个代码)
Filecheck = os.path.join(OUTPUT_FOLDER,"test"+version+"exe")
print Filecheck
if not os.path.exists(Filecheck):
base_url = urlJoin(LINK, + version + "_multi.exe")
print base_url
filename2 = "%s_%s_.exe" % (software.capitalize(),version)
original_filename = os.path.join(OUTPUT_FOLDER, filename2)
if writeFile(original_filename, httpRequestFile(base_url), "wb") and os.path.exists(original_filename):
print "Download done"
if not os.path.exists(<path-to-file>):
download_file()
我猜这就是您的意思,尽管很难说。
filename = "%s_%s_.exe" % (software.capitalize(),version)
if not os.path.exists(os.path.join(OUTPUT_FOLDER, filename)):
base_url = urlJoin(LINK, + version + "_multi.exe")
writeFile(original_filename, httpRequestFile(base_url), "wb")
仅供参考,如果您使用requests
,则不需要httpRequestFile
,因此可以将代码简化为:
import requests
from urllib2 import urljoin
filename = "%s_%s_.exe" % (software.capitalize(),version)
if not os.path.exists(os.path.join(OUTPUT_FOLDER, filename)):
with open(filename, "wb") as fp:
fp.write(requests.get(urljoin(LINK, version + "_multi.exe")).content)
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