Collecting bitcoinspend==0.1.6
  1 location(s) to search for versions of bitcoinspend:
  * https://pypi.python.org/simple/bitcoinspend/
  Getting page https://pypi.python.org/simple/bitcoinspend/
  Analyzing links from page https://pypi.python.org/simple/bitcoinspend/
  Could not find a version that satisfies the requirement bitcoinspend==0.1.6 (from versions: )
Cleaning up...
No matching distribution found for bitcoinspend==0.1.6
Exception information:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/lib/python3/dist-packages/pip/commands/wheel.py", line 199, in run
    if not wb.build():
  File "/usr/lib/python3/dist-packages/pip/wheel.py", line 749, in build
    self.requirement_set.prepare_files(self.finder)
  File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 554, in _prepare_file
    require_hashes
  File "/usr/lib/python3/dist-packages/pip/req/req_install.py", line 278, in populate_link
    self.link = finder.find_requirement(self, upgrade)
  File "/usr/lib/python3/dist-packages/pip/index.py", line 514, in find_requirement
    'No matching distribution found for %s' % req
pip.exceptions.DistributionNotFound: No matching distribution found for bitcoinspend==0.1.6