Python to do simple string matching details
Due to the need to extract some specific format fields in semi-structured text data, data-assisted mining analysis work, in the past are using Matlab tools for structured data processing modeling, matlab is good at matrix processing, structured data computation, Python has a common feature with matlab: concise syntax, rich libraries, for algorithmic simulation are a concise Python has common features with matlab: simple syntax, rich libraries, and is a simple language for algorithm simulation.
Python does string matching relatively easy to get started, and has a mature string processing library re for us to use;
With the help of re library, the matching can be done in two simple steps, much easier for workers doing data analysis/algorithms:
step1: build regular expression pattern and use compile() function to produce regular expression object
step2: call the methods and properties of the expression object generated by step1, and return the matching result.
<span style="color:#333300;"># Import Regular Expression Matching Module Py 3.0
import re
text = "today is 01/04/2015, happy new year..."
# Create regular expressions for dates
detepat = ('(\d+)/(\d+)/(\d+)')
# Make matches and print results
result = (text)
for m in result:
print(())</span>
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