本文说的这几个问题适用于 python 2.6+ 。
In [1]: a = 1
In [2]: def func():
...: print(a)
...: a = 2
...:
In [3]: func()
---------------------------------------------------------------------------
UnboundLocalError Traceback (most recent call last)
<ipython-input-3-08a2da4138f6> in <module>()
----> 1 func()
<ipython-input-2-9e6cf545bc05> in func()
1 def func():
----> 2 print(a)
3 a ...系统: CentOS
修改 vsftpd.conf，启用被动模式，指定端口:
pasv_min_port=12000 pasv_max_port=12199 pasv_enable=YES
配置防火墙 iptables，允许端口访问:
iptables -I INPUT -p tcp --dport 12000:12199 -j ACCEPT service iptables save
前两天在服务器上安装 gevent 时出现了 gevent/gevent.core.c:1: error: CPU you selected does not support x86-64 instruction set 错误：
$ pip install gevent Downloading/unpacking gevent Running setup.py egg_info for package gevent .... building 'gevent.core' extension gcc -pthread -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param ...