DEPS: Drop Python 3.4 support

Closes gh-15251.

Author: gfyoung

ci/requirements-3.4.build

@@ -1,6 +1,6 @@
-python=3.4*
+python=3.6*
 python-dateutil
 pytz
 nomkl
-numpy=1.10*
+numpy
 cython

ci/requirements-3.4.pip

@@ -1,20 +1,22 @@
 python-dateutil
 pytz
-numpy=1.10*
+numpy
+scipy
 openpyxl
 xlsxwriter
 xlrd
 xlwt
-html5lib
-patsy
-beautiful-soup
-scipy
-numexpr=2.4.6
+numexpr
 pytables
 matplotlib
 lxml
+html5lib
+jinja2
 sqlalchemy
-bottleneck
 pymysql
-psycopg2
-jinja2=2.8
+feather-format
+# psycopg2 (not avail on defaults ATM)
+beautifulsoup4
+s3fs
+xarray
+ipython

ci/requirements-3.4.run

@@ -23,9 +23,9 @@ dependencies:
        0)
          sudo apt-get install language-pack-it && ./ci/install_circle.sh JOB="2.7_COMPAT" LOCALE_OVERRIDE="it_IT.UTF-8" ;;
        1)
-         sudo apt-get install language-pack-zh-hans && ./ci/install_circle.sh JOB="3.4_SLOW" LOCALE_OVERRIDE="zh_CN.UTF-8" ;;
+         sudo apt-get install language-pack-zh-hans && ./ci/install_circle.sh JOB="3.6_SLOW" LOCALE_OVERRIDE="zh_CN.UTF-8" ;;
        2)
-         sudo apt-get install language-pack-zh-hans && ./ci/install_circle.sh JOB="3.4" LOCALE_OVERRIDE="zh_CN.UTF-8" ;;
+         sudo apt-get install language-pack-zh-hans && ./ci/install_circle.sh JOB="3.6" LOCALE_OVERRIDE="zh_CN.UTF-8" ;;
        3)
          ./ci/install_circle.sh JOB="3.5_ASCII" LOCALE_OVERRIDE="C" ;;
       esac

ci/requirements-3.4_SLOW.sh

@@ -34,7 +34,7 @@ Other Enhancements
 Backwards incompatible API changes
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-
+- Support has been dropped for Python 3.4 (:issue:`15251`)
 
 .. _whatsnew_0210.api:
 

ci/requirements-3.4_SLOW.build renamed to ci/requirements-3.6_SLOW.build

@@ -7,7 +7,7 @@
 Key items to import for 2/3 compatible code:
 * iterators: range(), map(), zip(), filter(), reduce()
 * lists: lrange(), lmap(), lzip(), lfilter()
-* unicode: u() [u"" is a syntax error in Python 3.0-3.2]
+* unicode: u() [no unicode builtin in Python 3]
 * longs: long (int in Python 3)
 * callable
 * iterable method compatibility: iteritems, iterkeys, itervalues
@@ -110,7 +110,7 @@ def signature(f):
     unichr = chr
 
     # This was introduced in Python 3.3, but we don't support
-    # Python 3.x < 3.4, so checking PY3 is safe.
+    # Python 3.x < 3.5, so checking PY3 is safe.
     FileNotFoundError = FileNotFoundError
 
     # list-producing versions of the major Python iterating functions