本文以eclipse2019.06安装PyDev为例，解决报错
An error occurred while collecting items to be installed session context was:(profile=D__DevelopTools_eclipse_jee-oxygen_eclipse, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,oracle.eclipse.tools.rest.lib,17.0.0.201709131633
在线安装
打开eclipse->Help->Install new software->Add,在Name中输入PyDev（名字随意），Location中输入http://pydev.org/updates
点击OK，并选择需要安装的两个IDE
一路Next，等待安装，在中途可能出现
An error occurred while collecting items to be installed session context was:(profile=D__DevelopTools_eclipse_jee-oxygen_eclipse, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,oracle.eclipse.tools.rest.lib,17.0.0.201709131633
这个报错。
解决方案：
打开Window->Preferences->Install/Update->Available software Sites,将PyDev改为disable
然后按照以上步骤重新安装，即可成功！
