处理 travis 无法安装 ta-lib 的问题

.travis.yml

@@ -4,6 +4,15 @@ cache: pip
 python:
     - 2.7
     - 3.6
+before_install:
+    - sudo apt install build-essential
+    - wget http://prdownloads.sourceforge.net/ta-lib/ta-lib-0.4.0-src.tar.gz
+    - tar -xzf ta-lib-0.4.0-src.tar.gz
+    - cd ta-lib/
+    - ./configure --prefix=/usr
+    - make
+    - sudo make install
+    - cd ..
 install:
     - pip install -r requirements.txt
     - pip install flake8  # pytest  # add another testing frameworks later