Add ipython to pipenv dev packages

Pipfile

@@ -5,6 +5,7 @@ verify_ssl = true
 
 [dev-packages]
 pytest = "*"
+ipython = "*"
 
 [packages]
 pandas = "*"

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "71586df7dfc05695c99c4fc2a4ea3215a190b638ac3d75877180bad890d58db2"
+            "sha256": "034e55aa1d397a7ba9037c558224121a3fa2998a7dba82d94bbc91a0769d07fa"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -102,6 +102,20 @@
             ],
             "version": "==19.1.0"
         },
+        "backcall": {
+            "hashes": [
+                "sha256:38ecd85be2c1e78f77fd91700c76e14667dc21e2713b63876c0eb901196e01e4",
+                "sha256:bbbf4b1e5cd2bdb08f915895b51081c041bac22394fdfcfdfbe9f14b77c08bf2"
+            ],
+            "version": "==0.1.0"
+        },
+        "decorator": {
+            "hashes": [
+                "sha256:86156361c50488b84a3f148056ea716ca587df2f0de1d34750d35c21312725de",
+                "sha256:f069f3a01830ca754ba5258fde2278454a0b5b79e0d7f5c13b3b97e57d4acff6"
+            ],
+            "version": "==4.4.0"
+        },
         "importlib-metadata": {
             "hashes": [
                 "sha256:6dfd58dfe281e8d240937776065dd3624ad5469c835248219bd16cf2e12dbeb7",
@@ -109,6 +123,28 @@
             ],
             "version": "==0.18"
         },
+        "ipython": {
+            "hashes": [
+                "sha256:1d3a1692921e932751bc1a1f7bb96dc38671eeefdc66ed33ee4cbc57e92a410e",
+                "sha256:537cd0176ff6abd06ef3e23f2d0c4c2c8a4d9277b7451544c6cbf56d1c79a83d"
+            ],
+            "index": "pypi",
+            "version": "==7.7.0"
+        },
+        "ipython-genutils": {
+            "hashes": [
+                "sha256:72dd37233799e619666c9f639a9da83c34013a73e8bbc79a7a6348d93c61fab8",
+                "sha256:eb2e116e75ecef9d4d228fdc66af54269afa26ab4463042e33785b887c628ba8"
+            ],
+            "version": "==0.2.0"
+        },
+        "jedi": {
+            "hashes": [
+                "sha256:53c850f1a7d3cfcd306cc513e2450a54bdf5cacd7604b74e42dd1f0758eaaf36",
+                "sha256:e07457174ef7cb2342ff94fa56484fe41cec7ef69b0059f01d3f812379cb6f7c"
+            ],
+            "version": "==0.14.1"
+        },
         "more-itertools": {
             "hashes": [
                 "sha256:409cd48d4db7052af495b09dec721011634af3753ae1ef92d2b32f73a745f832",
@@ -123,6 +159,28 @@
             ],
             "version": "==19.0"
         },
+        "parso": {
+            "hashes": [
+                "sha256:63854233e1fadb5da97f2744b6b24346d2750b85965e7e399bec1620232797dc",
+                "sha256:666b0ee4a7a1220f65d367617f2cd3ffddff3e205f3f16a0284df30e774c2a9c"
+            ],
+            "version": "==0.5.1"
+        },
+        "pexpect": {
+            "hashes": [
+                "sha256:2094eefdfcf37a1fdbfb9aa090862c1a4878e5c7e0e7e7088bdb511c558e5cd1",
+                "sha256:9e2c1fd0e6ee3a49b28f95d4b33bc389c89b20af6a1255906e90ff1262ce62eb"
+            ],
+            "markers": "sys_platform != 'win32'",
+            "version": "==4.7.0"
+        },
+        "pickleshare": {
+            "hashes": [
+                "sha256:87683d47965c1da65cdacaf31c8441d12b8044cdec9aca500cd78fc2c683afca",
+                "sha256:9649af414d74d4df115d5d718f82acb59c9d418196b7b4290ed47a12ce62df56"
+            ],
+            "version": "==0.7.5"
+        },
         "pluggy": {
             "hashes": [
                 "sha256:0825a152ac059776623854c1543d65a4ad408eb3d33ee114dff91e57ec6ae6fc",
@@ -130,6 +188,21 @@
             ],
             "version": "==0.12.0"
         },
+        "prompt-toolkit": {
+            "hashes": [
+                "sha256:11adf3389a996a6d45cc277580d0d53e8a5afd281d0c9ec71b28e6f121463780",
+                "sha256:2519ad1d8038fd5fc8e770362237ad0364d16a7650fb5724af6997ed5515e3c1",
+                "sha256:977c6583ae813a37dc1c2e1b715892461fcbdaa57f6fc62f33a528c4886c8f55"
+            ],
+            "version": "==2.0.9"
+        },
+        "ptyprocess": {
+            "hashes": [
+                "sha256:923f299cc5ad920c68f2bc0bc98b75b9f838b93b599941a6b63ddbc2476394c0",
+                "sha256:d7cc528d76e76342423ca640335bd3633420dc1366f258cb31d05e865ef5ca1f"
+            ],
+            "version": "==0.6.0"
+        },
         "py": {
             "hashes": [
                 "sha256:64f65755aee5b381cea27766a3a147c3f15b9b6b9ac88676de66ba2ae36793fa",
@@ -137,6 +210,13 @@
             ],
             "version": "==1.8.0"
         },
+        "pygments": {
+            "hashes": [
+                "sha256:71e430bc85c88a430f000ac1d9b331d2407f681d6f6aec95e8bcfbc3df5b0127",
+                "sha256:881c4c157e45f30af185c1ffe8d549d48ac9127433f2c380c24b84572ad66297"
+            ],
+            "version": "==2.4.2"
+        },
         "pyparsing": {
             "hashes": [
                 "sha256:43c5486cefefa536c9aab528881c992328f020eefe4f6d06332449c365218580",
@@ -159,6 +239,13 @@
             ],
             "version": "==1.12.0"
         },
+        "traitlets": {
+            "hashes": [
+                "sha256:9c4bd2d267b7153df9152698efb1050a5d84982d3384a37b2c1f7723ba3e7835",
+                "sha256:c6cb5e6f57c5a9bdaa40fa71ce7b4af30298fbab9ece9815b5d995ab6217c7d9"
+            ],
+            "version": "==4.3.2"
+        },
         "wcwidth": {
             "hashes": [
                 "sha256:3df37372226d6e63e1b1e1eda15c594bca98a22d33a23832a90998faa96bc65e",