Google Colab 基本操作

## 上传

from google.colab import files

uploaded = files.upload()

for fn in uploaded.keys():
  print('User uploaded file "{name}" with length {length} bytes'.format(
      name=fn, length=len(uploaded[fn])))

## 下载

from google.colab import files

with open('example.txt', 'w') as f:
  f.write('some content')

files.download('example.txt')

## 获取谷歌硬盘的文件

## 方法1 要输入授权码 整个谷歌硬盘整体挂载

from google.colab import drive
drive.mount('/content/gdrive')

## 方法2 下载并解压，压缩文件

从google drive 选择某个压缩文件并解压（这里file_id的获取需要右键点击上传文件，选择“获取共享链接”。将Google Drive的zip文件的共享链接复制后

截取"open?id="后面的一串地址字符 粘贴到下面第二个代码块file_id=' xxxxxxxxxxx '的X的部分）

!pip install PyDrive googledrivedownloader

from google_drive_downloader import GoogleDriveDownloader

GoogleDriveDownloader.download_file_from_google_drive(file_id='1I4YGP8LsZMJ6nyv0y3ncklds94XTg19z',dest_path="./tmp.zip",unzip=True)

!rm tmp.zip
!ls

### 写入并存储文件

with open('/content/gdrive/My Drive/foo.txt', 'w') as f:
  f.write('Hello Google Drive!')
!cat /content/gdrive/My Drive/foo.txt

### 升级安装 TensorFlow 

# To determine which version you're using:
!pip show tensorflow

# For the current version: 
!pip install --upgrade tensorflow

# For a specific version:
!pip install tensorflow==1.2

# For the latest nightly build:
!pip install tf-nightly

### 导入colab默认中没有的库 `!pip install` or `!apt-get install`

!pip install -q xxx

!apt-get -qq install -y xxx