擅长:python、mysql、java
<pre><code>matrix = pd.read_csv(survey_dictionary)#, encoding="UTF-8")
fistElem = None
nullVector = matrix['column3'].isnull()
incr = 0
for isNull in nullVector:
if isNull == True:
fistElem = incr
break
incr = incr + 1
for source in list:
if source[0] != fistElem:
matrix.at[fistElem,'column3'] = source[0]
matrix.at[fistElem,'column4'] = source[1]
matrix.to_csv(survey_dictionary, index =False, encoding='utf-8-sig')
</code></pre>