impossible to install pip dependencys

[mixman68]

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My Issue

Hello, I have error in pip

Python 2.7.12, Ubuntu 16.04.1 LTS, pip 8.1.1

pip install -r requirements.txt Requirement already satisfied (use --upgrade to upgrade): Flask==0.11.1 in /usr/local/lib/python2.7/dist-packages (from -r requirements.txt (line 1)) Requirement already satisfied (use --upgrade to upgrade): Jinja2==2.8 in /usr/local/lib/python2.7/dist-packages (from -r requirements.txt (line 2)) Requirement already satisfied (use --upgrade to upgrade): MarkupSafe==0.23 in /usr/local/lib/python2.7/dist-packages (from -r requirements.txt (line 3)) Requirement already satisfied (use --upgrade to upgrade): Werkzeug==0.11.10 in /usr/local/lib/python2.7/dist-packages (from -r requirements.txt (line 4)) Requirement already satisfied (use --upgrade to upgrade): argparse==1.2.1 in /usr/lib/python2.7 (from -r requirements.txt (line 5)) Requirement already satisfied (use --upgrade to upgrade): click==6.6 in /usr/local/lib/python2.7/dist-packages (from -r requirements.txt (line 6)) Requirement already satisfied (use --upgrade to upgrade): future==0.15.2 in /usr/local/lib/python2.7/dist-packages (from -r requirements.txt (line 7)) Collecting geographiclib==1.46.3 (from -r requirements.txt (line 8)) Using cached geographiclib-1.46.3.zip Requirement already satisfied (use --upgrade to upgrade): geopy==1.11.0 in /usr/local/lib/python2.7/dist-packages (from -r requirements.txt (line 9)) Exception: Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 209, in main status = self.run(options, args) File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 328, in run wb.build(autobuilding=True) File "/usr/lib/python2.7/dist-packages/pip/wheel.py", line 748, in build self.requirement_set.prepare_files(self.finder) File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 360, in prepare_files ignore_dependencies=self.ignore_dependencies)) File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 448, in _prepare_file req_to_install, finder) File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 387, in _check_skip_installed req_to_install.check_if_exists() File "/usr/lib/python2.7/dist-packages/pip/req/req_install.py", line 1011, in check_if_exists self.req.project_name AttributeError: 'Requirement' object has no attribute 'project_name' You are using pip version 8.1.1, however version 8.1.2 is available. You should consider upgrading via the 'pip install --upgrade pip' command. ...