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App Inventor 2 “虚拟”屏幕：同一屏幕展示多屏内容，模拟切换屏幕 · App...
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虚拟屏幕（虚拟分屏）
开发步骤
demo下载：
« 返回首页
虚拟屏幕（虚拟分屏）
好处：大部分需要连接的组件（比如蓝牙客户端、MQTT、BluetoothLE、Wifi、Socket等）如果跨屏幕的话，都需要...
Linux下安装项目管理工具Redmine - 开源 & Github - 清泛网 - 专注C/C++及内核技术
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# gem install rake //直接使用gem命令安装rake.
//也可以下载安装地址：http://rubyforge.org/frs/download.php/56872/rake-0.8.7.tgz
4、Ruby on Rails
# gem install rails
安装成功提示：
Successfully installed activesupport-2.3.3
Successfull...
使用TokuMX配置Replica Set集群 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...下。性能详细对比请参见《TokuMX vs. MongoDB 性能对比》。
下载地址：http://www.tokutek.com/tokumx-for-mongodb/
TokuMX目前只有Linux版本，下载完成后
解压(tar -zxvf xxxx.tar.gz)
进入bin目录，新建配置文件如：tokumx.conf （文件名随意）
内容...
关于我们 · App Inventor 2 中文网，少儿编程陪伴者
...帮助”菜单 -> AI伴侣信息，直接手机扫码安装到手机 或 下载AI伴侣到电脑并拖动到商业模拟器安装。 注：手机和电脑必须在同一局域网内，原理是电脑端启动WEB服务器，手机AI伴侣与WEB通信；电脑连手机热...
Python in Xcode 4+?
...ization identifier.
For the “Build Tool” field, type in /usr/local/bin/python3 for Python 3 or /usr/bin/python for Python 2 and then click “Next”. Note that this assumes you have the symbolic link (that is setup by default) that resolves to the Python executable. If you are unsure as to wher...
How to write PNG image to string with the PIL?
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For Python3 it is required to use BytesIO:
from io import BytesIO
from PIL import Image, ImageDraw
image = Image.new("RGB", (300, 50))
draw = ImageDraw.Draw(image)
draw.text((0, 0), "This text is drawn on image")
byte_io = By...
csv.Error: iterator should return strings, not bytes
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In Python3, csv.reader expects, that passed iterable returns strings, not bytes. Here is one more solution to this problem, that uses codecs module:
import csv
import codecs
ifile = open('sample.csv', "rb")
read = csv.reader(c...
VIP会员中心 · App Inventor 2 中文网，少儿编程陪伴者
...帮助”菜单 -> AI伴侣信息，直接手机扫码安装到手机 或 下载AI伴侣到电脑并拖动到商业模拟器安装。 注：手机和电脑必须在同一局域网内，原理是电脑端启动WEB服务器，手机AI伴侣与WEB通信；电脑连手机热...
What is sys.maxint in Python 3?
...d 2:
import sys
min = -sys.maxsize - 1
Method 1 works in both Python2 and Python3. Method 2 works in Python3. I have not tried Method 2 in Python2.
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sys.argv[1] meaning in script
...r script.
For example, if your script is named hello.py and you issue:
$ python3.1 hello.py foo
or:
$ chmod +x hello.py # make script executable
$ ./hello.py foo
Your script will print:
Hello there foo
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