BLD: minor break ci/requirements-optional-pip.txt (pandas-dev#22889)

Author: minggli

ci/requirements-optional-pip.txt

@@ -14,7 +14,7 @@ lxml
 matplotlib
 nbsphinx
 numexpr
-openpyxl=2.5.5
+openpyxl==2.5.5
 pyarrow
 pymysql
 tables
@@ -28,4 +28,4 @@ statsmodels
 xarray
 xlrd
 xlsxwriter
-xlwt
+xlwt

scripts/convert_deps.py

@@ -1,6 +1,7 @@
 """
 Convert the conda environment.yaml to a pip requirements.txt
 """
+import re
 import yaml
 
 exclude = {'python=3'}
@@ -15,6 +16,7 @@
 required = dev['dependencies']
 required = [rename.get(dep, dep) for dep in required if dep not in exclude]
 optional = [rename.get(dep, dep) for dep in optional if dep not in exclude]
+optional = [re.sub("(?<=[^<>])=", '==', dep) for dep in optional]
 
 
 with open("ci/requirements_dev.txt", 'wt') as f: