Use black for formatting

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "3ee82a3d0081be8881d2c211c6d0333b179e78754e953b609e10a51a4ab87c88"
+            "sha256": "4792f21af3f461ea6eb1c7c2f7387a545cb5cfaedaf5f27694e16b6ba0a042fd"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -58,6 +58,13 @@
         }
     },
     "develop": {
+        "appdirs": {
+            "hashes": [
+                "sha256:9e5896d1372858f8dd3344faf4e5014d21849c756c8d5701f78f8a103b372d92",
+                "sha256:d8b24664561d0d34ddfaec54636d502d7cea6e29c3eaf68f3df6180863e2166e"
+            ],
+            "version": "==1.4.3"
+        },
         "appnope": {
             "hashes": [
                 "sha256:5b26757dc6f79a3b7dc9fab95359328d5747fcb2409d331ea66d0272b90ab2a0",
@@ -68,10 +75,10 @@
         },
         "astroid": {
             "hashes": [
-                "sha256:0ef2bf9f07c3150929b25e8e61b5198c27b0dca195e156f0e4d5bdd89185ca1a",
-                "sha256:fc9b582dba0366e63540982c3944a9230cbc6f303641c51483fa547dcc22393a"
+                "sha256:ae61ddd0290963f4cf3bd74e6dffce807466bfe25438b2b3598471a1ce40a635",
+                "sha256:f447b5c8b7bd5cba229fb73890ea8088380c8c37ff33417c29a53a553f857419"
             ],
-            "version": "==1.6.5"
+            "version": "==2.0.0.dev3"
         },
         "atomicwrites": {
             "hashes": [
@@ -94,6 +101,21 @@
             ],
             "version": "==0.1.0"
         },
+        "black": {
+            "hashes": [
+                "sha256:22158b89c1a6b4eb333a1e65e791a3f8b998cf3b11ae094adb2570f31f769a44",
+                "sha256:4b475bbd528acce094c503a3d2dbc2d05a4075f6d0ef7d9e7514518e14cc5191"
+            ],
+            "index": "pypi",
+            "version": "==18.6b4"
+        },
+        "click": {
+            "hashes": [
+                "sha256:29f99fc6125fbc931b758dc053b3114e55c77a6e4c6c3a2674a2dc986016381d",
+                "sha256:f15516df478d5a56180fbf80e68f206010e6d160fc39fa508b65e035fd75130b"
+            ],
+            "version": "==6.7"
+        },
         "decorator": {
             "hashes": [
                 "sha256:2c51dff8ef3c447388fe5e4453d24a2bf128d3a4c32af3fabef1f01c6851ab82",
@@ -227,10 +249,10 @@
         },
         "ptyprocess": {
             "hashes": [
-                "sha256:e64193f0047ad603b71f202332ab5527c5e52aa7c8b609704fc28c0dc20c4365",
-                "sha256:e8c43b5eee76b2083a9badde89fd1bbce6c8942d1045146e100b7b5e014f4f1a"
+                "sha256:923f299cc5ad920c68f2bc0bc98b75b9f838b93b599941a6b63ddbc2476394c0",
+                "sha256:d7cc528d76e76342423ca640335bd3633420dc1366f258cb31d05e865ef5ca1f"
             ],
-            "version": "==0.5.2"
+            "version": "==0.6.0"
         },
         "py": {
             "hashes": [
@@ -248,11 +270,11 @@
         },
         "pylint": {
             "hashes": [
-                "sha256:a48070545c12430cfc4e865bf62f5ad367784765681b3db442d8230f0960aa3c",
-                "sha256:fff220bcb996b4f7e2b0f6812fd81507b72ca4d8c4d05daf2655c333800cb9b3"
+                "sha256:0990347c0f605927fadb2a9366a0b3d40bd19eb44e4312f0a1ef729a389b2f40",
+                "sha256:19b902f93f2dc3fa45565e54b88702b28379be40107f509a8516dde152460d1f"
             ],
             "index": "pypi",
-            "version": "==1.9.2"
+            "version": "==2.0.0.dev1"
         },
         "pytest": {
             "hashes": [
@@ -283,6 +305,12 @@
             ],
             "version": "==1.11.0"
         },
+        "toml": {
+            "hashes": [
+                "sha256:8e86bd6ce8cc11b9620cb637466453d94f5d57ad86f17e98a98d1f73e3baab2d"
+            ],
+            "version": "==0.9.4"
+        },
         "tornado": {
             "hashes": [
                 "sha256:1b83d5c10550f2653380b4c77331d6f8850f287c4f67d7ce1e1c639d9222fbc7",
@@ -301,6 +329,30 @@
             ],
             "version": "==4.3.2"
         },
+        "typed-ast": {
+            "hashes": [
+                "sha256:0948004fa228ae071054f5208840a1e88747a357ec1101c17217bfe99b299d58",
+                "sha256:25d8feefe27eb0303b73545416b13d108c6067b846b543738a25ff304824ed9a",
+                "sha256:29464a177d56e4e055b5f7b629935af7f49c196be47528cc94e0a7bf83fbc2b9",
+                "sha256:2e214b72168ea0275efd6c884b114ab42e316de3ffa125b267e732ed2abda892",
+                "sha256:3e0d5e48e3a23e9a4d1a9f698e32a542a4a288c871d33ed8df1b092a40f3a0f9",
+                "sha256:519425deca5c2b2bdac49f77b2c5625781abbaf9a809d727d3a5596b30bb4ded",
+                "sha256:57fe287f0cdd9ceaf69e7b71a2e94a24b5d268b35df251a88fef5cc241bf73aa",
+                "sha256:668d0cec391d9aed1c6a388b0d5b97cd22e6073eaa5fbaa6d2946603b4871efe",
+                "sha256:68ba70684990f59497680ff90d18e756a47bf4863c604098f10de9716b2c0bdd",
+                "sha256:6de012d2b166fe7a4cdf505eee3aaa12192f7ba365beeefaca4ec10e31241a85",
+                "sha256:79b91ebe5a28d349b6d0d323023350133e927b4de5b651a8aa2db69c761420c6",
+                "sha256:8550177fa5d4c1f09b5e5f524411c44633c80ec69b24e0e98906dd761941ca46",
+                "sha256:a8034021801bc0440f2e027c354b4eafd95891b573e12ff0418dec385c76785c",
+                "sha256:bc978ac17468fe868ee589c795d06777f75496b1ed576d308002c8a5756fb9ea",
+                "sha256:c05b41bc1deade9f90ddc5d988fe506208019ebba9f2578c622516fd201f5863",
+                "sha256:c9b060bd1e5a26ab6e8267fd46fc9e02b54eb15fffb16d112d4c7b1c12987559",
+                "sha256:edb04bdd45bfd76c8292c4d9654568efaedf76fe78eb246dde69bdb13b2dad87",
+                "sha256:f19f2a4f547505fe9072e15f6f4ae714af51b5a681a97f187971f50c283193b6"
+            ],
+            "markers": "python_version < '3.7' and implementation_name == 'cpython'",
+            "version": "==1.1.0"
+        },
         "wcwidth": {
             "hashes": [
                 "sha256:3df37372226d6e63e1b1e1eda15c594bca98a22d33a23832a90998faa96bc65e",